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 = '191') AND (category.subclass = '39') ORDER BY specimen ASC, date, patent, type |
Total of 1 patents found where: Class is '191'; Subclass is '39';
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T / S | Patent | Date | Description | Patentee | Category | Assigned To |
1912 | ||||||
U | 1,019,451 | March 5, 1912 | Sectional Insulator The GE breakaway insulator, M-2202 or M-2505, is shown in the catenary design |
GILLETTE, John C. |
Sectional Insulator | General Electric Co. |
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