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 = '501') AND (category.subclass = '26') ORDER BY date ASC, patent, type

Total of 2 patents found where: Class is '501'; Subclass is '26';

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
 1939
U Specimen known 2,157,100 May 9, 1939 Glazed Ceramic Insulator and the Like
Glaze - compression glaze		 ROWLAND, Davidge H.
 Glaze Locke Insulator Corp.
 1968
U 3,368,026 February 6, 1968 Electrical Insulator Having Improved Surface Electrical Stress Distribution
RFI prevention using two glaze coatings on suspension insulators		 VINCE, Patrick Michael
 RFI Doulton & Co., Ltd.

Total of 0.00 seconds