Patents. Hearings before the Committee on Patents, United States Senate, Seventy seventh Congress, second session, on S. 2303, a bill to provide for the use of patents in the interest of national defense or the prosecution of the war, and for other purposes, S. 2491 a bill to amend the patent laws, to prevent suppression of inventions, to promote the progress of science and the useful arts, and for other purposes ... 6

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