
58 U.S. 72 (1854)
17 How. 72
THE TROY IRON AND NAIL FACTORY, APPELLANT,
v.
GEORGE ODIORNE, JR., AND FRANCIS ODIORNE.[*]
Supreme Court of United States.

The case was argued by Mr. George T. Curtis for the appellants; no counsel appearing for the appellee.
*73 Mr. Justice CATRON delivered the opinion of the court.
Henry Burden obtained a patent, in 1840, for a machine to make hook-headed spikes. He applied for the patent on the 18th of April, 1839. It was assigned to the Troy Iron and Nail Company, who filed a bill against the Odiornes, to enjoin them, and for an account for using a machine to make similar spikes; and which machine, it is alleged, infringed the monopoly secured to Burden, by his patent of 1840. The case was brought to a hearing on the following stipulation: 
"The defendants agree not to deny the validity of the complainant's patent, provided they make out their title to the said letters-patent to be good.
"They also agree not to deny that the machine complained of in the complainant's bill, is an infringement on the patent granted to H. Burden, on August 4, 1840.
"If the complainants shall establish their title to the letters-patent aforesaid, the proper decree may be entered for the complainants, unless the defendants shall prove that the spike machine used by them, and complained of in the bill aforesaid, was constructed prior to the alleged application of H. Burden, made April 18, 1839, for letters-patent therefor, according to the provisions of the statute of the United States, 1839, ch. 88, sec. 7; or was the result of an independent, original invention, prior in time to the invention of the said Burden; in either of which cases the proper decree shall be entered for defendants."
The only question presented for our consideration on the stipulation, is, whether the machine employed by the appellees was constructed prior to the 18th of April, 1839, when Burden made application at the patent office, for his patent.
The machine complained of was built by Richard Savary, for the Boston Iron Company, in the spring of 1839, and obtained, by the appellees, by assignment. Savary was the patentee of a machine to make ship and boat-spikes, and, at the suggestion of the agents of the Boston Iron Company, added an attachment of an apparatus to make a hook-head to spikes; the process for making which, Savary deposes, he discovered in August, 1838. The time at which this apparatus was attached to the machine (substantially complete in its operative parts,) is the time when the machine complained of was "constructed," in the sense of the stipulation; it not being necessary that the machine should be geared and doing work. We are satisfied that it was set up, and subtantially finished, before the 18th of April, 1839, and, therefore, order the decree below to be affirmed.


*74 Order.
This cause came on to be heard on the transcript of the record from the circuit court of the United States for the district of Massachusetts, and was argued by counsel; on consideration whereof it is now here ordered, adjudged, and decreed by this court, that the decree of the said circuit court in this cause be and the same is hereby affirmed, with costs.
NOTES
[*]  Mr. JUSTICE CURTIS, having been of counsel, did not sit in this cause.
