Corkill, Frederick W. In Court of Customs and Patent Appeals, patent appeal no. 3720, in re Frederick W. Corkill, process of treating minerals; brief for commissioner of patents.
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Corkill, Frederick W. In Court of Customs and Patent Appeals, patent appeal no. 3720, in re Frederick W. Corkill, process of treating minerals; brief for commissioner of patents.
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Corkill, Frederick W. In Court of Customs and Patent Appeals, patent appeal no. 3720, in re Frederick W. Corkill, process of treating minerals; brief for commissioner of patents.