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SELECT DISTINCT patent.*, YEAR(date) as year FROM patent LEFT JOIN category ON category.patent = patent.patent AND category.type = patent.type WHERE (category.class = '264') AND (category.subclass = '571') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '264'; Subclass is '571';

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T / S Patent Date Description Patentee Category Assigned To
 1942
U 2,301,939 November 17, 1942 Production of Ceramic Bodies
Press to make a very dense porcelain body. It is neither wet process nor dry process porcelain. The product was called ""Prestite"" porcelain.		 FISCHER, Eugene H.
 Press Westinghouse Electric & Mfg. Co.

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