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 = '817') ORDER BY category DESC, date, patent, type |
Total of 1 patents found where: Class is '73'; Subclass is '817';
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T / S | Patent | Date | Description | Patentee | Category | Assigned To |
Manufacturing | ||||||
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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