Search the Insulator Patent Reference Library

Search the Insulator Patent Reference Library:

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 = '256') AND (category.subclass = '47') ORDER BY date ASC, patent, type

Total of 3 patents found where: Class is '256'; Subclass is '47';

View a patent by clicking on the patent number. You can sort by any of the columns by clicking on the column name.

T / S	Patent	Date	Description	Patentee	Category	Assigned To
		1887
U	368,284	August 16, 1887	Electric Wire Clamp Insulator Cleat - clamp type	FLETCHER, John R.	Cleat
		1890
U	419,642	January 21, 1890	Insulator for Electric Wires Split ring with split ring holder and lag screw	CORNOG, Isaac P.	Split
		1897
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

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