Plummer, William B. In Court of Customs and Patent Appeals, patent appeal no. 4628, in re William B. Plummer, processing well fluids; brief for commissioner of patents.
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Plummer, William B. In Court of Customs and Patent Appeals, patent appeal no. 4628, in re William B. Plummer, processing well fluids; brief for commissioner of patents.
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Plummer, William B. In Court of Customs and Patent Appeals, patent appeal no. 4628, in re William B. Plummer, processing well fluids; brief for commissioner of patents.