Ball, Albert P. In Court of Customs and Patent Appeals, patent appeal no. 3522, in re Albert P. Ball, protective covers for electric switches; brief for commissioner of patents.
Publication Title:
Ball, Albert P. In Court of Customs and Patent Appeals, patent appeal no. 3522, in re Albert P. Ball, protective covers for electric switches; brief for commissioner of patents.
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Ball, Albert P. In Court of Customs and Patent Appeals, patent appeal no. 3522, in re Albert P. Ball, protective covers for electric switches; brief for commissioner of patents.