Ubbelohde, Leo. In Court of Customs and Patent Appeals, patent appeal no. 4597, in re Leo Ubbelohde, cellulose products; brief for commissioner of patents.
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Ubbelohde, Leo. In Court of Customs and Patent Appeals, patent appeal no. 4597, in re Leo Ubbelohde, cellulose products; brief for commissioner of patents.
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Ubbelohde, Leo. In Court of Customs and Patent Appeals, patent appeal no. 4597, in re Leo Ubbelohde, cellulose products; brief for commissioner of patents.