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http://worldcat.org/entity/work/id/103300953

Patents and trade-marks. Hearings before the Committee on patents, House of representatives, Seventy-sixth Congress, first session, on H.R. 6618, trade-marks, H.R. 6721, classification of patents, H.R. 6877, to protect the United States in patent infringement suits, H.R. 6872, H.R. 6873, H.R. 6874, H.R. 6875, and H.R. 6878, amending patent laws. June 22, 1939

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  • "Patents and trade-marks. Hearings before the Committee on patents, House of representatives, Seventy-sixth Congress, first session, on H.R. 6618, trade-marks, H.R. 6721, classification of patents, H.R. 6877, to protect the United States in patent infringement suits, H.R. 6872, H.R. 6873, H.R. 6874, H.R. 6875, and H.R. 6878, amending patent laws. June 22, 1939"@en
  • "Patents and trade-marks. Hearings before the Committee on patents, House of representatives, Seventy-sixth Congress, first session, on H.R. 6618, trade-marks, H.R. 6721, classification of patents, H.R. 6877, to protect the United States in patent infringement suits, H.R. 6872, H.R. 6873, H.R. 6874, H.R. 6875, and H.R. 8678, amending patent laws. June 22, 1939"

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