Koehring, Philip A. In Court of Appeals of District of Columbia. Apr. term, 1928. patent appeal no. 2167, in re Philip A. Koehring, design for concrete mixer truck body and frame; brief for commissioner of patents.
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Koehring, Philip A. In Court of Appeals of District of Columbia. Apr. term, 1928. patent appeal no. 2167, in re Philip A. Koehring, design for concrete mixer truck body and frame; brief for commissioner of patents.
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Koehring, Philip A. In Court of Appeals of District of Columbia. Apr. term, 1928. patent appeal no. 2167, in re Philip A. Koehring, design for concrete mixer truck body and frame; brief for commissioner of patents.