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 = '408') AND (category.subclass = '14') ORDER BY specimen ASC, date, patent, type |
Total of 1 patents found where: Class is '408'; Subclass is '14';
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T / S | Patent | Date | Description | Patentee | Category | Assigned To |
1928 | ||||||
U | 1,663,329 | March 20, 1928 | Forming and Tapping Machine Machine to form threads in plastic clay bodies |
AUSTIN, Arthur O. |
Manufacturing | The Ohio Brass Co. |
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