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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 = '123') AND (category.subclass = '169R') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '123'; Subclass is '169R';

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T / S Patent Date Description Patentee Category Assigned To
 1941
U 2,264,428 December 2, 1941 Article of Ceramic of Vitreous Material
Manufacturing method to improve quality of porcelain during firing		 AUSTIN, Arthur O.
 Manufacturing The Ohio Brass Co.

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