22 F. 780 | U.S. Circuit Court for the District of Western Pennsylvania | 1885
Doubtless a single sale by an inventor, in the ordinary course of business, of a machine embodying his completed invention, more than two years before his application for a patent, will defeat his right thereto, and may be shown in bar of a suit for infringement. And it may well be that such consequence will not be averted by the mere condition in the contract of sale that the purchaser shall have the right to return the machine and take back the price should it fail to work satisfactorily. Henry v. Francestown Soap-stone Stove Co. 17 O. G. 569; S. C. 2 Fed. Rep. 78. But the proofs here show that the one sale relied on to support the plea was not only characterized by that condition, but was otherwise exceptional. It was made at an underprice, and without profit to the seller. Moreover, I am persuaded that the sale was made for the purpose of securing a fair test of the invention.
The plaintiff’s improved engine was designed especially for drilling and operating oil-wells. The one he sold to Rosenfield & Buyer was the first of the kind he had built, and the only one up to that time. “Running light,” doing no work, at his shop, it was apparently a success; but it could not be satisfactorily tested there. Experienced machinists and oil producers, who there examined it, were doubtful of its practical working in drilling; and they expressed the opinion that the piston-valve would soon work Atoóse (resulting in a leak of steam and loss of power) by the cutting and wearing away of the valve and valve-bore; and so firmly convinced of this defect were they that they would not give the engine a trial, even at the plaintiff’s expense. 'The objection went to the practical efficiency of the engine to perform the service for which it was mainly designed. Now, obviously, the only way to determine whether or not the objection was well founded was to put the engine to work at an oil-well, and keep it at work there a sufficient length of time. Mr. Hamor, a member of the purchasing firm, was an expert in sinking oil-wells and in the care