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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 = '606') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '264'; Subclass is '606';

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T / S Patent Date Description Patentee Category Assigned To
 1961
U 2,975,499 March 21, 1961 Ceramic Tunnel Kiln
More fuel efficient tunnel kiln for burning ceramic ware and produces a more uniform quality of porcelain.		 LAPP, Grover W.
 Tunnel Kiln  

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