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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 = '73') AND (category.subclass = '822') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '73'; Subclass is '822';

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T / S Patent Date Description Patentee Category Assigned To
U 2,059,036 October 27, 1936 Clay Testing Apparatus
Machine to measure the hardness or plasticity of clay
ROWLAND, Davidge H.
Manufacturing Locke Insulator Corp.

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