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 = '403') AND (category.subclass = '282') ORDER BY date ASC, patent, type

Total of 2 patents found where: Class is '403'; Subclass is '282';

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
 1870
U Specimen known 105,834 July 26, 1870 Improvement in Telegraph Insulators
Pin hole tapered with grooves to receive wedged, split-end pin		 OAKMAN, Samuel
 Pin  
 1927
U 1,625,266 April 19, 1927 Rod Coupling
Lightning rod made solid with parallel fins and connected by coupling with matching male and female threads crimped over the ends of the rod sections		 MAST, Charles O.
 Lightning Rod Coupling Mast Lightning Rod Co.

Total of 0.01 seconds