Crecelius, Lawrence P. In Court of Customs and Patent Appeals, patent appeal no. 3668, in re Lawrence P. Crecelius, process of treating coal and burning the same; brief for commissioner of patents.
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Crecelius, Lawrence P. In Court of Customs and Patent Appeals, patent appeal no. 3668, in re Lawrence P. Crecelius, process of treating coal and burning the same; brief for commissioner of patents.
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Crecelius, Lawrence P. In Court of Customs and Patent Appeals, patent appeal no. 3668, in re Lawrence P. Crecelius, process of treating coal and burning the same; brief for commissioner of patents.