Katzenberger, Oscar. In Court of Appeals of District of Columbia, Jan. term, 1917, patent appeal no. 1107, in re Oscar Katzenberger, spring hinges; brief for commissioner of patents.
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Katzenberger, Oscar. In Court of Appeals of District of Columbia, Jan. term, 1917, patent appeal no. 1107, in re Oscar Katzenberger, spring hinges; brief for commissioner of patents.
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Katzenberger, Oscar. In Court of Appeals of District of Columbia, Jan. term, 1917, patent appeal no. 1107, in re Oscar Katzenberger, spring hinges; brief for commissioner of patents.