Walker, John C. In Court of Customs and Patent Appeals, patent appeal no. 3229, in re John C. Walker, improvements in breaking of oil-water emulsions; brief for commissioner of patents.
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Walker, John C. In Court of Customs and Patent Appeals, patent appeal no. 3229, in re John C. Walker, improvements in breaking of oil-water emulsions; brief for commissioner of patents.
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Walker, John C. In Court of Customs and Patent Appeals, patent appeal no. 3229, in re John C. Walker, improvements in breaking of oil-water emulsions; brief for commissioner of patents.