National Stone-Tile Corporation. In Court of Customs and Patent Appeals, patent appeal no. 2919, in re National Stone-Tile Corporation, trade-mark for hollow tile; brief for commissioner of patents.
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National Stone-Tile Corporation. In Court of Customs and Patent Appeals, patent appeal no. 2919, in re National Stone-Tile Corporation, trade-mark for hollow tile; brief for commissioner of patents.
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National Stone-Tile Corporation. In Court of Customs and Patent Appeals, patent appeal no. 2919, in re National Stone-Tile Corporation, trade-mark for hollow tile; brief for commissioner of patents.