Ewert, Otto F. In Court of Customs and Patent Appeals, patent appeal no. 3515, in re Otto F. Ewert, spline coupling; brief for commissioner of patents.
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Ewert, Otto F. In Court of Customs and Patent Appeals, patent appeal no. 3515, in re Otto F. Ewert, spline coupling; brief for commissioner of patents.
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Ewert, Otto F. In Court of Customs and Patent Appeals, patent appeal no. 3515, in re Otto F. Ewert, spline coupling; brief for commissioner of patents.