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 = '29') AND (category.subclass = '809') ORDER BY date ASC, patent, type |
Total of 1 patents found where: Class is '29'; Subclass is '809';
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T / S | Patent | Date | Description | Patentee | Category | Assigned To |
1926 | ||||||
U | 1,589,940 | June 22, 1926 | Nail Knob Assembling and Securing Machine Machine to manufacture nail-knobs |
CASE, Francis M. |
Knob | Federal Porcelain Co. |
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