Search the Insulator Patent Reference Library:

Build your search criteria. The patent must match all the values specified.
Select patent types: Utility   Design   Reissue
Patent number:
Date:
Year between: and
Patentee starting with:
City:
State:
Assigned To starting with:
Description containing:
Category:
Class:    Subclass:
Click Search when complete:
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 = '264') AND (category.subclass = '277') ORDER BY date ASC, patent, type

Total of 2 patents found where: Class is '264'; Subclass is '277';

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
 1928
U 1,677,294 July 17, 1928 Insulator Assembly Jig
Centering jig for assembling multipart porcelain insulators		 ROBERTSON, John Cullen
 Manufacturing Locke Insulator Corp.
 1935
U 2,010,934 August 13, 1935 Cementing Process and Apparatus
Apparatus to align the pin during the cementing process in a suspension insulator		 SMITH, William A.
 Manufacturing The Ohio Brass Co.

Total of 0.01 seconds