Kauffman, Walter L., 2nd. In Court of Customs and Patent Appeals, patent appeal no. 3604, in re Walter L. Kaufman [Kauffman], 2nd. wringers; brief for commissioner of patents.
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Kauffman, Walter L., 2nd. In Court of Customs and Patent Appeals, patent appeal no. 3604, in re Walter L. Kaufman [Kauffman], 2nd. wringers; brief for commissioner of patents.
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Kauffman, Walter L., 2nd. In Court of Customs and Patent Appeals, patent appeal no. 3604, in re Walter L. Kaufman [Kauffman], 2nd. wringers; brief for commissioner of patents.