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machines were constructed according to and embodied all the inventions described in the letters patent aforesaid, and were designed and adapted in their ordinary and natural operation, when used in the manufacture of shoes, to produce the shoes patented to Blake by the patent No. 29,562, and for some time past has, without the license and against the consent of the complainant, used the said machine, and manufactured and sold large quantities of the improved shoes made according to the process patented to Blake as aforesaid.

The defendant seeks to justify such manufacture and sale upon the ground that, the extended term of the machine pattent having expired, he, in common with all the world, has the right to use machines embodying the said mechanism; and, if by such lawful use of common property he infringes the process and product patents of the complainant, these patents are necessarily void.

We have thus presented for consideration an interesting and novel question. All embarassment would have been avoided if the officers of the patent-office had required the inventor, when he applied for the process and product patent, to surrender his original patent for the mechanism, and nad then made three several re-issues—for the machine, the process, and the product-all bearing the same date and expiring at the same time. Such course was pursued in the case of The Rubber Co. v. Goodyear, 9 Wall. 788, where the inventor first patented the process, and afterwards surrendered the letters patent and took his re-issue in two several patents, one for the product and the other for the process of the product. But such a step was not required in the present case, and it is a fair inference, frc^n what was decided in Bennett v. Fowler, 8 Wall. 445, that the courts have no absolute control over the head of the patent-office in the exercise of his discretion whether a given invention or improvement shall be embraced in one, two, or more letters patent.

Taking the case, then, as we find it, the naked question presented is : If an inventor embody in a machine a new mechanism to accomplish a desired and express purpose, does the patent law authorize him to procure (1) a patent for the machine,

(2) a patent for the process by which the result was achieved, and (3) a patent for the product of the process as a new article of manufacture; and if such patents expire at different times has the court the power to decree that the younger patents in the series shall die when the older one runs out? Or, to state the proposition more succintly, is there authority in the law to continue to an inventor the monopoly in the product of a machine after the machine itself has become public property by falling into the domain of public use? In determining such a question reference must be had, of course, to the law as it stood when the several patents were issued. These were the acts of July 4, 1836, and March 3, 1839, which were substantially the same as the present statute in regard to patentable subjects.

By the sixth section of the first-recited act the commis. sioner of patents was authorized to grant letters patent to any person who had discovered or invented “any new and useful art, machine, manufacture, or composition of matter, or any new and useful improvement in any art, machine, manufacture, or composition of matter, not known or used by others before his or their discovery or invention thereof, and not, at the time of his application for a patent, in public use or on sale with his consent or allowance as the inventor or discoverer.” By the seventh section of the later act such public use or sale shall not avoid the patent, unless the same has continued for two years prior to the application for the patent. It is here we find the scope and extent, as well as the limitation, of the power of the commissioner of patents in regard to granting or withholding letters patent. If the inventor, after obtaining his first patent for the machine, had waited for more than two years before applying for the process and product patents, there may have been such disclosure and public use of the invention that the limitation would have applied, and the patent-office been compelled, under the provisions of the supplement of 1839, to have rejected the subsequent application. But no such time elapsed, and I am of the opinion that it was competent for the patentee, within the two years, to take out his process and

product patents, and thus to guard himself against the danger and loss that might arise from others using the process to accomplish other results, or securing the product by the agency of other means and instrumentalities.

Two reasons were forcibly presented by the learned counsel for the defendant why the act should not have the above interpretation: (1) Because it was asking the court, by judicial construction, to extend the monopoly and life of a patent for two years beyond the time prescribed by the law; (2) because the machine patent having expired, and belonging to the public, it was a contradiction in terms to hold that its use could be restrained on the ground that by its use other patents were infringed. These reasons need not be considered separately, and I think the difficulties wbich they suggest grow out of a misapprehension of what the court is supposed, in fact, to do in the case. The argument was that if an inventor procures a patent for a machine, and, after holding it for any length of time less than two years, is permitted, without the surrender of the original and a re-issue, to apply for a patent for the process employed, and the product obtained from the use of the machine, and then, after the expiration of the machine patent, may restrain its use by the public until the process and product patents run out, it is practically extending the life of the first patent, and giving the owner a monopoly beyond the period of time to which the law in express terms limited it.

But the court does not propose to restrain generally the use of the machine but only such unlawful use of it as infringes the vested rights of others. As long as separate patents for a machine, and the process and the product, are allowable, they represent distinct inventions, (Kelleher v. Darling, 14 0. G. 673,) and each one may live, without interference or molestation, its whole life without regard to the death of the others. While the product patent continues in existence, the manufacture of the product by any instrumentality is prohibited, and it is no answer to the charge of infringement to say: "I had the right to use the particular mechanism by which I obtained the product."

But the defendant insists that the machine belongs to the public to use, and that nothing can be manufactured from it except the product, of which the complainant has yet the monopoly. If this be true, then the public must find out some other use to put it to, or abstain from its use until the time comes in which it may be used without infringing the right of others.

A provisional injunction must issue according to the prayer of the bill.

McKay, Trustee, v. McKNIGHT and others.

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McKay, TBUSTEE, V. DIBERT, ante, 587, followed, and provisional in

junction allowed.

In Equity

Nixon, D.J. The preliminary injunction is allowed in the above case, not only for the reason stated in the opinion in the case of the same complainant against Dibert, but for the additional reason that the defendant William McKnight, as licensee of the complainant, is estopped by the express terms of his contract from setting up the defences which have been brought forward in excuse of the infringement by the defendants.


(Circuit Court, D. Maryland. February 2, 1881.)


Held, that the“Barker” patent No. 103,125, re-issue No. 8,781, and the "Bostwick” patent No. 104,412, re-issue No. 8,466, for improvements in soldering irons, are not in‘ringed by the device known as the "Tillery Soldering I'ool," as exhibited in this case.

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Benjamin Price, for complainants.
Brown & Smith, for defendants.

MORRIS, D. J. Infringement of patent. This is a bill in equity filed by the complainants for alleged infringement by the defendants of two letters patent for improvement in sol. dering irons, the title to which the complainants have acquired by assignment. The first is the “Barker" patent No. 103,125, granted May 17, 1870; re-issued January 11, 1876, No. 6,846; second re-issue July 1, 1879, No. 8,781. The second is the “Bostwick” patent No. 104,412, granted June 21, 1870; re-issued October 29, 1878, No. 8,466.

The original Barker patent contains the following description and claim: “In constructing this machine I make the disk or casting of sufficient thickness to retain the heat, and of suitable size to cover the lid of the can with the recess, B, in the under side, to give room for the convex lid of the can, and to confine the soldering process to the outer edge of the lid or cover. To this disk I connect the handle, C, of sufficient length to hold when heated. At the side of and parallel with the handle I connect the small rod or wire, D, with a loop or ring connecting it with the handle at the top and the bottom, passing through the disk, A, so as to allow it to slide up and down.” He then describes the process of sealing a can by the use of his invention, The rod, D, is pushed down through the disk, and placed upon the center of the cover to hold it. The heated disk is then pushed down in contact with the solder or sealing material till it is melted, then turned back and forth till the solder is spread evenly around the lid. The disk is then to be withdrawn with the rod, D, still prossed upon the lid till the solder or sealing material sets or hardens, when the operation is completed. What he claims and desires to secure by letters patent is "the disk, A, with the recess, B, in the under side, as set forth, in combination with the movable rod or wire, D, to hold the lid while sealing or closing.”

It is conceded that there was nothing new in the annular soldering iron. The claim, therefore, of Barker in this original patent was substantially for the rod or wire so combined

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