Campbell, Robert H. In Court of Customs and Patent Appeals, patent appeal no. 4146, in re Robert Hunter Campbell, ornamental design for metal capsule for compressed gases; brief for commissioner of patents.
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Campbell, Robert H. In Court of Customs and Patent Appeals, patent appeal no. 4146, in re Robert Hunter Campbell, ornamental design for metal capsule for compressed gases; brief for commissioner of patents.
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Campbell, Robert H. In Court of Customs and Patent Appeals, patent appeal no. 4146, in re Robert Hunter Campbell, ornamental design for metal capsule for compressed gases; brief for commissioner of patents.