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Freeman v. Asmus

Freeman v. Asmus, 145 U.S. 226 (1892)
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Court
Supreme Court of the United States
Decided
May 16, 1892
Docket
No. 323
Judges
Blatchford
Citations
145 U.S. 22612 S. Ct. 93936 L. Ed. 6851892 U.S. LEXIS 2135
Syllabus
The first claim of reissued letters patent No. 3204, granted to George As-mus, November 24, 1868, for an improvement in blast furnaces, on the surrender of original letters patent No. 70,447, granted to E. W. Lfirmann, of Os'nabruch, in Prussia, November 5, 1867, namely, “ A blast furnace with a closed breast, where the slag is discharged through an opening or openings cooled by water, substantially as set forth,” is invalid, because there was nothing in the original specification indicating that any such claim was intended to be made in the original patent, although the application for the reissue was made less than a year after the original pate.nt was granted; and because, as respected that claim, the reissue was not for the same invention as the original patent, and was, therefore, within the express exception of the statute (Act of July 4, 1836, C.-357, § 13, 5 Stat. 122). The cases in this court on the subject of reissues, reviewed. The fact commented on, that the application for the reissue was not signed or sworn to by the inventor, but only by the assignee of the patent.
Summary
APPEAL EROM THE CIRCUIT COURT OE THE UNITED STATES EOR THE EASTERN DISTRICT OE PENNSYLVANIA. The court stated the case as follows : This is a suit in equity, brought in the Circuit Court of the United States for the Eastern District of Pennsylvania, by George Asmus against Margaret C. Freeman, founded on the alleged infringement of reissued letters patent No. 3204, granted to said Asmus, November 24, 1868, on the surrender of original letters patent No. 70,447, granted to F. W. Liirmann, of Osnabruck, in Prussia, November 6, 1867, for an improvement in blast furnaces. On the 12th of July,-1867, Liirmann assigned to Asmus all the right, title and interest in and to the improvement for which Liirmann was about to apply for a patent, and the specification for which was signed by him on that day. The patent was granted to Liirmann, although the assignment was recorded in the Patent Office some time before the granting of the patent. On the 3d of November, 1868, Asmus filed in the Patent Office a petition signed by fiimself, but not signed by Liirmann, praying for the reissue of the patent. In that petition, Asmus stated that he believed that the original patent was inoperative and invalid by reason of a defective specification, which defect had arisen from inadvertence and mistake; and he asked that a new patent might issue to him for the same invention, for the residue of the period of the original patent, under the amended specification therewith presented. The path annexed thereto, made by Asmus,- was sworn to October 24,1868, and stated that Asmus verily believed that by reason of an insufficient .or defective specification, the original patent was not “fully valid'and available to him,” and that the error had arisen from inadvertence, accident or mistake, and without any fraudulent or deceptive intention. Accompanying the petition and oath was a statement signed by the attorneys for Asmus, which said : .“The errors and defects occurring in the original specification by- inadvertence and mistake and sought to be corrected by this application for a reissue are as follows: The invention, as described in the original specification and represented in the drawings, clearly comprises a blast furnace with a closed breast, where the slag is discharged through an opening or openings cooled with water, but the claim in the original specification is confined to a slag-discharge piece or cinder block constructed and attached in a certain specific manner. It is obvious that the cinder block D can be connected to or cast solid with the plate 0, without changing the nature of the invention, and in the new specification this defect has been corrected and a clause has been added to the claim with the view to cover the whole ground of the invention.” The answer of the -defendant denies the novelty of the invention, the alleged infringémónt, and the validity of the reissue, and. assigns as grounds of such invalidity that the application for the reissue was not assented to, signed • or sworn to by Lürmann; that the reissue was for an invention different from that claimed in the original patent; and that the reissue contains much new matter interpolated by Asmus. Several other defences were also set up. With a view to a comparison of the specification of the original with that of the reissue, the following paper contains' both of the specifications, the parts in italics not being found in the original, and the parts in brackets not being found in the reissue: . . “Be it known that [I] F. -W. Liirmann, of Osnabruck, in the Kingdom of Prussia [have] invented a new and useful improvement in blast furnaces, and I, George Asmus, of the city, county, a/nd State of New York', assignee of the said F. W. Lurmann, do hereby declare [that] the following [is] to be a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawing, forming part of this specification, in which drawing Figure 1 is a vertical central section of a furnace [to which my improvement is applied] built according to this invention. Fig. 2 is a horizontal section through the tuyeres. Fig. 3 is a front elevation of the slag-discharge piece or cinder block detached: Fig. 4 is a ver- tical section thereof [of the latter, also detached]. Similar letters indicate corresponding parts. “ This invention relates to [furnaces for smelting iron ore, and has for its .object to dispense with the ‘tymp’ or fore hearth and -the ‘ wall stone ’ now in common use in iron blast furnaces, and to replace the tymp arrangement by such a construction as allows the slag to] certain improvements in blast furnaces with a closed breast; and it consists, principally, in a blastfurnace with a closed breast, where-the slag is discharged through am, opening cooled with water in such a manner that the tymp or fore hearth amd the wall stone cam, be dispensed with, and that the slag cam, be tapped directly from the hearth. It consists, fumther, in a slag-discharge piece or ‘ cinder block ’ of peculiam construction, as will be hereinafter more fully explained, whereby the building of a furnace according to this inmention am,d its correct operation ame materially facilitated. In order to enable those skilled in the art to full/y understand the object of this inmention, I will first point out the disadvamtages of blast furnaces with a fore hearth, such as are now in common use for melUng iron ore. In such [the tymp arrangement~\ furnaces the slag is driven out [of the furnace] by first being [being first] forced below the tymp stone, which projects below the level of the tuyeres and intercepts the currents of air and prevents their escape with the slag which stands in the [tymp] fore hearth at the same level as on the hearth, the slag being discharged only when it rises in the [tymp] fore hearth high enough to overflow the top of the wall stone that forms the bottom of the discharging orifice. By this arrangement the tymp stone constitutes a trap which intercepts the currents of air and causes their pressure to be exerted directly on the surface of the slag on the hearth. This method of construction has several disadvantages, one of which is the difficulty of keeping the tymp stone and the surrounding parts in repair; another is, that the pressure of the currents of air or wind is limited [and counteracted] by the counter-pressure of the column of slag in the [tymp] fore hearth ; and another is that, one side of the furnace being occupied by the [tymp,] fore hearth, no tuyere can be applied on that side, and consequently the supply of wind is irregularly distributed. By the improvement which constitutes the subject-matter of this present invention these disadvantages are overcome [My invention avoids or overcomes these disadvantages] in a simple and effective manner. “ In [this example of my invention] the drawings the letter A designates the furnace, and B several tuyeres, which are arranged therein at a proper height. The furnace is constructed with a closed breast, [My furnace has no tymp] and the sides of the hearth, whether round or square, extend clear down to the bottom stone, the usual opening, (not shown in the drawing,) being made in the lower part of the hearth for the discharge of the iron. The openings for the tuyeres B are distributed at equal distances apart in the. sides of the hearth. At a suitable height from the bottom stone [I leave] an opening is left in the hearth, in which [I place] is placed a cast-iron or brass slag-discharge piece or cinder block, D, which is cast or made with numerous channels or pipes run.ning up and down or in other directions through it, as shown in Figs. 3 and 4. The cinder block [piece] D [is] may be formed with a dovetail on its upper end, which is fitted into ' the bottom of a stationary metallic plate, C,'connected with the furnace, or it rnrnj be attached to said plate in awy other desirable manner, or cast solid with the same, if desired. [The] This plate [C] is also cast or made with channels or pipes running through it, and' the channels or pipes of said plate and of the cinder block [piece] D may be so arranged as to connect or' communicate with each other when the plate C and cinder block [piece] D are in their proper position, [positions] or thtey may be independent of each other. In the drawing the plate G is shown above the cinder blodk, but it may also be placed below or in any other desirable position in relation to the same. The' object of the [said] channels or pipes is to permit the plate C and cinder block [piece] D to be cooled by forcing water through them while the furnace is in operation, proper connections being made for' that purpose with a reservoir of cold water or with a force-pump. One or more holes are made in the [said piece] cinder block D, through which the slag is discharged, the shape of said holes being shown in Figs. 3 and 4, the middle portion being cylindrical, but each end being conical or'flaring. The dimensions of the ■[slag-discharge piece] cinder block are a little less than the opening in which it is placed and the space left around it is filled with sand, which can be readily removed in case it is desired to remove, the block D to repair it or if it is desired to have an opening in the hearth to work through, as when any. irregularity in the smelting process has taken place. The flow of the cooling water through the [slag-discharge piece] cinder block D is regulated for the purpose of controlling the discharge of the slag through it. By allowing much cooling water to circulate through its water channels or pipes, the temperature of the block [piece] D is lowered' sufficiently to allow a coating of slag to adhere and choke its 'discharge openings, which are of less diameter in the middle than at their ends. By reducing the flow of cooling water the cinder block [piece] is allowed to retain a higher temperature, and in consequence the slag is melted out of the discharge openings and they become clear and open and permit the slag to flow without interruption. When the slag in the hearth is [lower than] below the level of the discharge openings the latter are simply closed by an iron plug [rod]: [My] This invention can be easily applied by those skilled in. the art to which it belongs, to blast furnaces of the common construction, by removing the fore hearth and closing the aperture left in the breast of the furnace under the tymp stone by inserting the plate C with the cinder block JD. [This invention is attended with several advantages over the common method of ' constructing or arranging furnaces, among which. I mention the following: ] The principal advantages derived from this invention are asfolloios: First,' it permits a higher pressure of wind. Second, the hearth, is. preserved in better condition than where the common mode of construction is retained. Third, the labor of the operation of smelting is lessened. Fourth, it allows one more side of the hearth for a tuyere. Fifth, it. avoids the stoppages of the wind supply now necessary as often as the iron is discharged. Sixth, a considerable increase is gained in the product of the furnace, while at the same time the cost of labor and repairs is lessened. “Having thus described this invention, [What] what I claim as new, and desire to secure by .letters patent, is — “ 1. A blastfurnace with a closed breast, where the slag is discharged through cm opening or openings cooled by water, substantially as set forth. ■, “ [1.] 2. The slag-discharge, piece or cinder block D, constructed and arranged substantially as described. “[2.] 3. The [slag-discharge piece] cinder block D, in combination with the plate C, to which it is fitted [attached,] substantially as described. “ [3.] 4. The shape of the discharge Opening or openings of the cinder block [piece] D, being made flaring at its ends, .and of diminished diameter in the middle or central part, substantially as described. “ [4.] 5. The combining [Combining with] of the slag-discharge piece or cinder block with a series of water channels or pipes, substantially as and for the purpose above set forth. “ [5.] -6. Combining with the metallic plate C a series of water channels or pipes, substantially as and for the purpose set forth. “ [6.] Y. The method of controlling the discharge of slag from blast furnaces by regulating the temperature of the slag-discharge piece or cmder block, substantially as described. “ This specification signed by me this [twelfth day of July, 186Y,] 2ith day of October, 1868. “ [F. ~W. Lüemann.] George Asmus.” After a hearing on pleadings and proofs,- the court entered a decree, on the 19th of July, 1886, adjudging that the reissued patent was valid; that the defendant had infringed its first claim; and that the plaintiff was entitled to recover profits and damages, and referring it to a master to ascertain the same. The opinion of the Circuit Court was given May 14, 1886, and is reported in 2Y Fed. Rep. 684. On the report of the master, a final decree was made by the court October 12, 1888, awarding to the plaintiff $1000 damages and the costs of suit. The defendant has appealed to this court.

Syllabus and headnotes are prepared by the reporter or publisher, not the court, and are not part of the opinion.

Opinion — Blatckfobd

Mb. Justice Blatckfobd, after stating the case, delivered the opinion of the court.

■ As we are of opinion that the decree below must be reversed, because of the invalidity of the reissue, it is unnecessary to consider any other question.

The only claim of the- reissue which, it is. now contended, was infringed, is the first claim, which reads as follows: “ 1. A blast furnace with a closed breast, where the slag is discharged through an opening or openings cooled by water, substantially as set forth.” Claims 2 to 7, inclusive, of the reissue are substantially in the same language as claims 1 to 6 of the original. Claim 1 in the reissue is entirely new, and .it is not contended here that :the defendant infringed any of the claims of the original patent, or any claim of the reissue other than claim 1.

It was held 'by the Circuit Court that, while claim 1 of the reissue was not embraced in 'the original, the matter claimed by that claim was so embraced; that the language of the original specification clearly described' the closed-breast furnace; that a furnace built in accordance with the language of the *236 original would be. necessarily closed-breasted; that thé other element of claim 1 of the reissue, “ where the slag is discharged through an opening or openings cooled by water,” was no less clearly described in the original; that the drawings originally filed showed the same; that claim 1 of the reissue might, therefore, have been embraced in the patent as first issued, or introduced into the reissue without changing the specification; that the change made by the reissue simply expressed the same thing in different terms; that claim 1 of the reissue was, therefore, not an enlargement of - the invention; that such additional claim, omitted through inadvertence, accident or mistake, might be secured by means of a reissue, if applied for within a reasonable time; that in this case the application was made a little after the expiration of one year; and that the question whether the omission occurred through inadvertence, accident or mistake, was a question for the Commissioner of Patents.

But we are of opinion that these views cannot prevail in the present case. It is apparent, from the description contained in the specification of the original patent, that Lürmann considered his invention to consist essentially of a removable slag-discharge piece, cast with numerous channels .or pipes running through it, formed with a dovetail at its upper end fitted into the bottom of a stationary metallic plate connected with the furnace, and provided with channels or pipes so that water might flow through the slag-discharge piece and plate, conjointly or separately, that they might be cooled while the furnace was in operation. The slag-discharge piece was made removable, and 'provided with one or more holes, the middle portion of the holes being cylindrical, but each end being conical or flaring. By regulating the flow of water through the slag-discharge piece, its temperature could be lowered sufficiently to allow a coating of slag to' choke the discharge-opening, which coating could be melted out by diminishing the flow of water and thus allowing the temperature to rise. The opening could be closed by an iron block when necessary.

■ The'fundamental devices claimed by Lürmann as his improvements were (1) the metal plate C, provided with water *237 channels; (2) the removable slag-discharge piece provided with water channels; and (3) the method of regulating the discharge of the slag by raising and lowering the temperature of the slag-discharge piece. - The first claim of the original patent claimed a slag-discharge piece provided with a water circulation, connected with a water-cooled plate C, having small hour-glass-shaped discharge openings, and capable of being removed .from the furnace when desired. The slag-discharge piece of the second claim was of the same character as that described in the first claim. The third claim was for the shape of the slag-discharge opening, flaring at its ends, and of diminished diameter in the middle. The fourth claim was for the combination' of Such slag-discharge piece and a series of water channels or pipes. The fifth claim was for the combination of the metallic plate C, with a series of water channels or.pipes. The .sixth claim was for regulating the discharge of the .slag by varying The temperature, of the water-cooled slag-discharge piece.

Asmus, in his testimony, states that his reason for obtaining a reissue was to make the meaning of the whole invention as clear as possible; that the reason why he did not apply sooner for' the reissue was that, in arranging a number of furnaces, they diffqied more or less in construction, and he had to adapt his construction according to the circumstances; that this made it necessary to give the construction quité different shapes, retaining always the main points-;

< that experience caused him, in order to prevent mistakes, to find a formula which- expressed, the spirit of the invention in the clearest way possible, and whieh flowed plainly from the technical description given in the original patent; and that the experience and ,the reasoning derived from it took up some time. When- asked what kind of mistakes he referred to, he said,1 “ That difference'in shape might be takenfor a different thing.”

- This testimony shows that, instead of desiring merely to .remedy formal defects which appeared on the face of the papers,. Asmus waited until expérience and reasoning had shown him the broadest -formula in which tó express .the claim's of his paten}; so a® to cover all possible modifications.

*238 While the petition for the reissue states that Asmus believes that the original patent “ is inoperative and invalid by reason of a defective specification,” he does not make that allegation in his oath, but states in the latter merely that the patent “ is" not fully valid and available to. him; ” and in the statement accompanying the petition and oath, his attorneys say that the claim.in the original specification is confined to a slag-discharge piece or cinder block. constructed and attached in a certain, specific manner, and that the new first claim is added “ with- the view to cover the whole ground of the invention.” A comparison of the original’specification with .that -of the reissue shows that, the only substantial ■ change made "is to insert in the latter enlarged definitions and descriptions of the alleged invention, and the new and enlarged first claim.- - In the assignment of July 12, 1861, from Lürmann to Asmus, which bears date the same day as the signature ofLürmann to the original-specification, the latter .says that his invention “is fully described in, the specification pertaining to said application, which I have signed -tinder oath.” The inventor did not swear to the specification filed for the reissue; and, although his oath was not. required to it, as the law stood at the time, the .reissue was ap'pliéd. for, yet ■ the fact remains that the reissue was wholly the work of the assignee, and not at all of the inventor; and it by no means followed that the inventor would ever have asserted that there was any error in the original specification or; claims,-' arising from inadvertence, accident, or mistake". 1 The new. matter inserted in the specificatioh ctf the reissue, .and hereinbefore set forth in italics, in coxméction with the omission from the reissue of the parts in brackets contained in the original, constituted a broad-definition on which to found claim 1 of the reissue — a~"clahn- to “ a blast furnace with a closed breast, where the slag is discharged through an open-' ing -or openings cooled by jváter, substantially as set forth.” In.addition to the description in the original of the connection of the slag-discharge piece witbdhe metallic plate'C, it is also stated.in t-he-reissue' that such" slag-discharge piece.may be attached to the plaie O “in any other desirable, manner1,'or *239 ‘cast solid with the same, if desired.” This is new matter, as is also the addition, in the specification of the reissue, that, in the drawing, the plate C is shown • above the slag-discharge piece or cinder block, but that if may also be placed' below, or in any other desirable position in relation tó the same. So, also, it is added in the specification of the reissue that the invention can be applied to blast furnaces of the common construction “ by removing the fore hearth and closing the aperture left in the breast of the furnace under the tymp .stone by inserting the plate C with the cinder block D.”

. But the material point is the extension of the invention claimed, by the addition of. claim 1 of the reissue, the words in which,. “ substantially as. set forth,” refer to the new matter in the reissue, that the slag is discharged “ through an opening cooled, with water in such a manner that the tymp, or fore hearth, and the wall stone can be dispensed with.” The intention manifestly was to construe the first claim so as to cover any kind of blast furnace with a closed breast, having a slag-discharge opening cooled in any manner or to any extent by water. There is nothing in the original specification which indicates that any such claim was intended to be made in the original patent. On the contrary, the whole purport of that specification shows that it was intended to claim only a slag-discharge piece or cinder block constructed and attached in a specific manner, as is set'.forth in the statement of the attorneys of Asmus, accompanying his application for the reissue.

' This case was decided in the Circuit Court, May-14, 1886; and both before and since.that there have been numerous decisions in this court which require that the present reissue be held, invalid,- although it was applied' for within less than a year after the granting of the. original patent. Those cases are Mahn v. Harwood, 112 U. S. 354 ;

Coon v. Wilson, 113 U. S. 268 ;

Ives v. Sargent, 119 U. S. 652 ;

Parker & Whipple Co. v. Yale Clock Co., 123 U. S. 87 ;

Matthews v. Ironclad Mfg., Co., 124 U. S. 347 ;

Hoskin v. Fisher, 125 U. S. 217 ;

Flower v. Detroit, 127 U. S. 563 ;

Yale Lock Co.

v. Berkshire Bank, 135 U. S. 342 ;

Electric Gas Co. v. Boston Electric Co., 139 U. S. 481 .

*240 In Mahn v. Harwood, a reissue was held invalid, where it was clear that the only object of it was to .enlarge the claims of the original patent. The description was not altered in the least. The claims in the original were clear and explicit, one of them being retained substantially in the reissue. Nothing was altered or changed, except to- multiply the claims and make them greater, and that was done, hot f.or’ the benefit of •the original patentee, but for that of his assignee.

In Coon v. Wilson , the application for the reissue was made a little more than three- months after the granting of the original patent; but it was said that.a clear mistake, inadvertently committed1, in the wording of the claim, was necessary,' without reference to the length of time; that there was no mistake in the wording of the claim of the original; that the description warranted no other claim and did not warrant the claim of the reissue;-that the déscription had to be changed in the reissue to‘warrant its. new claim; and that the description in the reissue was not a more clear, and satisfactory statement of what was described in the original, but was a description of a different .thing, so ingeniously' worded as to cover what was claimed in the reissue.

In Ives v. Sargent , the doctrine of Coon v. Wilson was approved and applied.

•The whole subject was reviewed in Parker & Whipple Co.

v. Yale Clock Co., and the dicta in the case-of Seymour v. Osborne, 11 Wall. 516 , were considered; and it was held that what was suggested or indicated in the original specification was not to be considered as a part of the original invention intended to be covered by the- original patent, unless it could be seen, from a comparison of the two patents, that, the invention which the original was intended .to cover em-araced 4he things thus suggested or indicated in the original specification, and unless the original specification indicated that those ‘things were embraced in the invention intended to. have been secured by the original patent. The cases of Mahn v. Harwood and Coon v. Wilson were cited and approved.

The case of Packer & Whipple Co.

v. Yale Clock Co.

is cited and- applied in Matthews v. Ironclad Mfg. Co., in Hoskin v. *241 Fisher , in Yale Lock Co.

v. James, 125 U. S. 447, 464 , and in Flower v. Detroit .

In Yale Lock Co.

v. Berkshire Bank , a reissue was held invalid, although it was applied-for only thirteen days after the granting of the original, because there was not a clear mistake,, inadvertently committed, in the wording of the claim; and the cases of Coon v. Wilson, Ives v. Sargent , and Parker & Whipple Co.

v. Yale Clock Co.

were cited and applied.

In Electric Gas Co.

v. Boston Electric Co., a reissue was held invalid because there was no inadvertence, accident or mistake, such as would authorize a reissue with new claims, and the sole object of the reissue was unlawfully to expand the claims.

¥e are of opinion that the present reissue is invalid, so far as the first claim of it is concerned, because it is not for the same invention as the original patent, and is, therefore, within the express exception-of the statute, (Act of July 4, 1836, c. 357, § 13, 5 Stat. 122 ). There is nothing inconsistent with the foregoing views; in our decision in Topliff v. Topliff, ante, 156.

The decree of the Circuit Gourt is reversed, a/nd the case re- ■ mounded to that court, with a- direction to dismiss the Mil, with costs.

How later courts describe this case

No later court has written an explanatory parenthetical about this case yet.

Cited by 10 cases

View all citing references →
1892: 11900: 11906: 11909: 11911: 11925: 11930: 11942: 11950: 11952: 118922026peak 1892 · 1

Relies on it most ⓘ

  1. Lorraine v. Townsend8 F.2d 673 (9th Cir. 1925)
  2. Varian v. Llewellyn178 F.2d 997 (C.C.P.A. 1950)
  3. Chicago Ry. Equipment Co. v. Perry Side Bearing Co.170 F. 968 (1909)
  4. Westinghouse Electric Corp. v. Bulldog Electric Products Co.106 F. Supp. 819 (N.D.W. Va. 1952)
  5. Brown & Bigelow v. Louis F. Dow Co.42 F.2d 785 (8th Cir. 1930)
  6. McDowell v. Ideal Concrete Mach. Co.187 F. 814 (7th Cir. 1911)

Most recent

  1. Westinghouse Electric Corp. v. Bulldog Electric Products Co.106 F. Supp. 819 (N.D.W. Va. 1952)
  2. Varian v. Llewellyn178 F.2d 997 (C.C.P.A. 1950)
  3. U. S. Industrial Chemicals, Inc. v. Carbide & Carbon Chemicals Corp.315 U.S. 668 (1942)
  4. Brown & Bigelow v. Louis F. Dow Co.42 F.2d 785 (8th Cir. 1930)
  5. Lorraine v. Townsend8 F.2d 673 (9th Cir. 1925)
  6. McDowell v. Ideal Concrete Mach. Co.187 F. 814 (7th Cir. 1911)

Citing references are not a citator: they show that a later opinion cites this case, not whether it followed, distinguished, or overruled it. Check negative history before relying on this case.

Authorities cited 11

DepthCaseCited by
Coon v. Wilson, 113 U.S. 268 (1885) 52
Ives v. Sargent, 119 U.S. 652 (1887) 45
Mahn v. Harwood, 112 U.S. 354 (1884) 195
Yale Lock Mfg. Co. v. Berkshire Nat'l Bank, 135 U.S. 342 (1890) 28
Hoskin v. Fisher, 125 U.S. 217 (1888) 15
Flower v. Detroit, 127 U.S. 563 (1888) 6
Seymour v. Osborne, 78 U.S. (11 Wall.) 516 (1871) 455
Parker & Whipple Co. v. Yale Clock Co., 123 U.S. 87 (1887) 66
Elec. Gas-Lighting Co. v. Boston Elec. Co., 139 U.S. 481 (1891) 20
Yale Lock Mfg. Co. v. James, 125 U.S. 447 (1888) 8
Matthews v. Ironclad Mfg. Co., 124 U.S. 347 (1888) 6

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