Langsner, Adolph. In Court of Customs and Patent Appeals, patent appeal no. 4807, in re Adolph Langsner, for drafting apparatus; brief for commissioner of patents.
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Langsner, Adolph. In Court of Customs and Patent Appeals, patent appeal no. 4807, in re Adolph Langsner, for drafting apparatus; brief for commissioner of patents.
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Langsner, Adolph. In Court of Customs and Patent Appeals, patent appeal no. 4807, in re Adolph Langsner, for drafting apparatus; brief for commissioner of patents.