Markel, Charles. In Court of Appeals of District of Columbia, Oct. term, 1926, patent appeal no. 1901, in re Charles Markel, cross-heads; brief for commissioner of patents.
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Markel, Charles. In Court of Appeals of District of Columbia, Oct. term, 1926, patent appeal no. 1901, in re Charles Markel, cross-heads; brief for commissioner of patents.
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Markel, Charles. In Court of Appeals of District of Columbia, Oct. term, 1926, patent appeal no. 1901, in re Charles Markel, cross-heads; brief for commissioner of patents.