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:
Year between: and
Patentee starting with:
Assigned To starting with:
Description containing:
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 = '337') AND (category.subclass = '283') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '337'; Subclass is '283';

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
U Specimen known 552,680 January 7, 1896 Electric Cut-Out and Insulator
Cut-out for transformer mounted on and integral to the transformer. (see patent 538,090)
WAGNER, Robert A.
Fuse Holder  

Total of 0.00 seconds