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 WHERE (assigned_to = 'Copperweld Steel Co.') ORDER BY date ASC, patent, type

Total of 3 patents found where: Assigned To is 'Copperweld Steel Co.';

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
 1940
U 2,202,538 May 28, 1940 Line Conductor Reinforcement and Tie
Tie wire or line reinforcement made of a stiff drawn wire preformed helix to fit around the diameter of the line wire without bending		 SELQUIST, Rolf
 Tie Wire Copperweld Steel Co.
 1941
U 2,234,656 March 11, 1941 Insulator Tie for Electric Conductors
Preformed tie wire clips that fit around the insulator and clip on the line wire		 SCHMALZ, James H.
 Tie Wire Copperweld Steel Co.
 1947
U 2,421,286 May 27, 1947 Insulator Tie for Line Conductors
Preformed hard drawn wire helix to act as line wire reinforcement and tie wire		 PYLE, Ralph D.
 Tie Wire Copperweld Steel Co.

Total of 0.01 seconds