Abrahamsen, Alfred W. In Court of Customs and Patent Appeals, patent appeal no. 2745, in re Alfred W. Abrahamsen, reversible floor scraper; brief for commissioner of patents.
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Abrahamsen, Alfred W. In Court of Customs and Patent Appeals, patent appeal no. 2745, in re Alfred W. Abrahamsen, reversible floor scraper; brief for commissioner of patents.
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Abrahamsen, Alfred W. In Court of Customs and Patent Appeals, patent appeal no. 2745, in re Alfred W. Abrahamsen, reversible floor scraper; brief for commissioner of patents.