Croicell, Erd V. In Court of Customs and Patent Appeals, patent appeal no. 3594, in re Erd V. Crowell, apparatus for cementing wells; brief for commissioner of patents.
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Croicell, Erd V. In Court of Customs and Patent Appeals, patent appeal no. 3594, in re Erd V. Crowell, apparatus for cementing wells; brief for commissioner of patents.
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Croicell, Erd V. In Court of Customs and Patent Appeals, patent appeal no. 3594, in re Erd V. Crowell, apparatus for cementing wells; brief for commissioner of patents.