Mann, Leon. In Court of Customs and Patent Appeals, patent appeal no. 2621, in re Leon Mann and Morris Koppelman, improvements in packing material; brief for commissioner of patents.
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Mann, Leon. In Court of Customs and Patent Appeals, patent appeal no. 2621, in re Leon Mann and Morris Koppelman, improvements in packing material; brief for commissioner of patents.
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Mann, Leon. In Court of Customs and Patent Appeals, patent appeal no. 2621, in re Leon Mann and Morris Koppelman, improvements in packing material; brief for commissioner of patents.