# Wade v. Metcalf/Opinion of the Court

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* Opinion of the Court
United States Supreme Court
129 U.S. 202
Wade v. Metcalf
The decision of this case turns upon section 4899 of the Revised Statutes, by which it is enacted that 'every person who purchases of the inventor or discoverer, or with his knowledge and consent constructs any newly invented or discovered machine, or other patentable article, prior to the application by the inventor or discoverer for a patent, or who sells or uses one so constructed, shall have the right to use, and vend to others to be used, the specific thing so made or purchased, without liability therefor.' This section clearly defines four classes of persons who shall have the right to use, and to vend to others to be used, a specific patentable machine: First, every person 'who purchases of the inventor' the machine before his application for a patent; second, every person who, 'with his knowledge and consent, constructs' the machine before the application; third, every person 'who sells' a machine 'so constructed,' that is to say, which has been constructed with the knowledge and consent of the inventor by another person; fourth, every person who 'uses one so constructed,' that is to say, constructed with the inventor's knowledge and consent by another person. In order to entitle a person of any of these four classes to use and vend the machine, under this section, the machine must originally have been either purchased from the inventor, or else constructed with his knowledge and consent, before his application for a patent; and it may well be that a fraudulent or surreptitious purchase or construction is insufficient. Kendall v. Winsor, 21 How. 322; Andrews v. Hovey, 124 U.S. 694, 708, 8 Sup. Ct. Rep. 676. But after a machine has been constructed by any person, with the inventor's knowledge and consent, before the application for a patent, every other person who either sells or uses that machine is within the protection of the section, and needs no new consent or permission of the inventor. If the first two clauses of the section, taken by themselves, leave the matter in any doubt, the succeeding clause, including every person 'who sells or uses one so constructed,' makes it perfectly clear that the implied license conferred by the section sets the specific machine free from the monopoly of the patent in the hands of any person, just as if that person were the lawful assignee of one holding the machine under a purchase or an express and unrestricted license from the inventor. McClurg v. Kingsland, 1 How 202; Bloomer v. McQuewan, 14 How. 539, 549; Bloomer v. Millinger, 1 Wall. 340; Adams v. Burke, 17 Wall. 453; Birdsell v. Shaliol, 112 U.S. 485, 487, 5 Sup. Ct. Rep. 244. In the case at bar, the machines of the plaintiff's invention were not purchased from him by the defendants; but they were constructed with his knowledge and consent, by a partnership of which he and the defendants were the members. It was strongly argued for the defendants that a sale or a license from the inventor to two or more partners or tenants in common confers upon each a right to use and to sell the subject of the sale or license, and that the defendants therefore come within the second class of persons defined in the statute. But it is unnecessary to determine whether that is so or not, because, if it is not, the defendants clearly come within the fourth class, being persons who use machines which have been constructed with the knowledge and consent of the inventor before his application for a patent. The peculiar provisions of the agreement by which the partnership between the plaintiff and the defendants was dissolved did not, in terms or in legal effect, enlarge or diminish the rights of either party, independently of that agreement, in the machines in question. Decree affirmed.

## Notes

This work is in the public domain in the United States because it is a work of the United States federal government (see 17 U.S.C. 105).
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