Digest of Patent And Trade-Mark Cases Decided By the Court of Appeals of the District of Columbia On Appeal From the Commissioner of Patents
Digest of Patent And Trade-Mark Cases Decided By the Court of Appeals of the District of Columbia On Appeal From the Commissioner of Patents
District of Columbia. Court of Appeals
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An improvement in type-bars of type-writers, upon the efficacy of which the successful operation of the whole machine depends. Held not of that simple character which requires no test or operation in order to establish reduction to practice. lb. 350. Where the cap made was crude and the inventor himself testifies that he did not regard that particular cap as fit for prac- tical use on a bottle, it cannot be regarded as a reduction to prac- tice of the invention, although others made subsequentl...y upon the same pattern were practical and successful. Lindemeyr v. Hoff- man, 18 App. D. C. I ; 95 O. G. 838; 1901 C. D. 353. 351. A common cloth-cased horse-collar stuffed with cotton is one of those devices which are so simple and their purpose and efficiency so obvious that the complete construction of one of a size and form intended for and capable of practical use is to be regarded as a sufficient reduction to practice without actual use or test. Couch v. Barnett, 23 App. D. C. 446; no O. G.
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