reduction to practice

reduction to practice
The completion of a discovery by putting the product thereof, an invention, to use or practice. 40 Am J1st Pat § 27. In patent interference proceedings, the law pertaining to a successful reduction to practice is not satisfied by demonstrations which indicate that if subjected to a practical test a device might work, but rather requires the submission of evidence establishing that the device was subjected to a practical test and that it did, in fact work. Jacke v Long, 27 Cust & Pat App 1147, 111 F2d 184. It is academic that the question of what constitutes reduction to practice in the sense of the patent laws may depend in a large part on the inherent nature of the article under scrutiny, together with the consideration of the use for which it is designed. As, where tests of a metal fishing rod conducted in casting tournaments, were held to establish a reduction to practice though no fish was ever caught with a rod embodying the invention. Heddon v Cowdery, 26 Cast & Pat App 743, 100 F2d 426.

Ballentine's law dictionary. . 1998.

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