SELECT DISTINCT patent.*, YEAR(date) as year FROM patent LEFT JOIN name ON name.patent = patent.patent AND name.type = patent.type LEFT JOIN category ON category.patent = patent.patent AND category.type = patent.type WHERE (category.class = '256') AND (category.subclass = '47') ORDER BY last_name DESC, first_name, date, patent, type |
Total of 3 patents found where: Class is '256'; Subclass is '47';
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T / S | Patent | Date | Description | Patentee | Category | Assigned To |
HOOVER, Frank | ||||||
U | 575,952 | January 26, 1897 | Insulator Ball insulator fit in hole in bottom of crossarm |
HOOVER, Frank |
Ball | 2/3 to W. Bennett & D. Murrell |
FLETCHER, John R. | ||||||
U | 368,284 | August 16, 1887 | Electric Wire Clamp Insulator Cleat - clamp type |
FLETCHER, John R. |
Cleat | |
CORNOG, Isaac P. | ||||||
U | 419,642 | January 21, 1890 | Insulator for Electric Wires Split ring with split ring holder and lag screw |
CORNOG, Isaac P. |
Split |
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