Heath, Frederick. In Court of Appeals of District of Columbia, Apr. term, 1916, patent appeal no. 1044, in matter of application of Frederick Heath; brief for commissioner of patents.
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Heath, Frederick. In Court of Appeals of District of Columbia, Apr. term, 1916, patent appeal no. 1044, in matter of application of Frederick Heath; brief for commissioner of patents.
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Heath, Frederick. In Court of Appeals of District of Columbia, Apr. term, 1916, patent appeal no. 1044, in matter of application of Frederick Heath; brief for commissioner of patents.