Papenfus, Daniel E. In Court of Customs and Patent Appeals, patent appeal no. 3909, in re Daniel E. Papenfus, plastic composition; brief for commissioner of patents.
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Papenfus, Daniel E. In Court of Customs and Patent Appeals, patent appeal no. 3909, in re Daniel E. Papenfus, plastic composition; brief for commissioner of patents.
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Papenfus, Daniel E. In Court of Customs and Patent Appeals, patent appeal no. 3909, in re Daniel E. Papenfus, plastic composition; brief for commissioner of patents.