Crabbs, Roscoe B. In Court of Customs and Patent Appeals, patent appeal no. 3926, in re Roscoe B. Crabbs, asbestos cement shingles; brief for commissioner of patents.
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Crabbs, Roscoe B. In Court of Customs and Patent Appeals, patent appeal no. 3926, in re Roscoe B. Crabbs, asbestos cement shingles; brief for commissioner of patents.
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Crabbs, Roscoe B. In Court of Customs and Patent Appeals, patent appeal no. 3926, in re Roscoe B. Crabbs, asbestos cement shingles; brief for commissioner of patents.