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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 = '156') AND (category.subclass = '322') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '156'; Subclass is '322';

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T / S Patent Date Description Patentee Category Assigned To
 1939
U 2,170,602 August 22, 1939 Method of Producing Glass Building Blocks
Bonding agent applied to mortar bearing block sides		 BAUER, John E.
 OI Owens-Illinois Glass Co.

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