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 = '256') AND (category.subclass = '58') ORDER BY type ASC, date, patent

Total of 3 patents found where: Class is '256'; Subclass is '58';

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
 1894
U 522,302 July 3, 1894 Self-Locking Cleat for Electric Wires
Cleat - self-tying (shown on page 273 of 1897 Electric Appliance Co. catalog No. 12
NASHOLD, Elias
Cleat 2/5 to Henry Baskette
 1903
U 737,027 August 25, 1903 Insulator
Self-tying slot top (see Brown No. 1 p. 128)
RUTLEDGE, William G.
Self-tying Slot Top  
 1909
U Specimen known 929,878 August 3, 1909 Insulator
U-183
RANSON, Joseph W.
Insulator  

Total of 0.01 seconds