Waldheim, John, In Court of Appeals of District of Columbia, Apr. term, 1928, patent appeal no. 2168, in re John Waldheim, typewriting machines; brief for commissioner of patents.
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Waldheim, John, In Court of Appeals of District of Columbia, Apr. term, 1928, patent appeal no. 2168, in re John Waldheim, typewriting machines; brief for commissioner of patents.
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Waldheim, John, In Court of Appeals of District of Columbia, Apr. term, 1928, patent appeal no. 2168, in re John Waldheim, typewriting machines; brief for commissioner of patents.