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 = '249') AND (category.subclass = '63') ORDER BY date ASC, patent, type

Total of 4 patents found where: Class is '249'; Subclass is '63';

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
		1854
U	11,515	August 15, 1854	Glass Mold Mold and press to manufacture Lefferts ramshorn insulator	BROOKE, William	Hook
		1872
U	132,214	October 15, 1872	Improvement in Formers for Segmentally Screw Threaded Insulators Plunger to form segmented threads	OAKMAN, Samuel	Plunger
U	132,215	October 15, 1872	Improvement in Formers for Segmentally Screw Threaded Insulators Plunger to form segmented threads	OAKMAN, Samuel	Plunger
		1904
U	771,483	October 4, 1904	Glass Mold Glass press that can be adapted for insulator manufacture	MYERS, McClelland	Press	1/2 to John P. Elkins

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