Walker, Warren R. In Court of Customs and Patent Appeals, patent appeal no. 2766, in re Warren R. Walker, improvement in electric switches; brief for commissioner of patents.
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Walker, Warren R. In Court of Customs and Patent Appeals, patent appeal no. 2766, in re Warren R. Walker, improvement in electric switches; brief for commissioner of patents.
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Walker, Warren R. In Court of Customs and Patent Appeals, patent appeal no. 2766, in re Warren R. Walker, improvement in electric switches; brief for commissioner of patents.