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 = 'Jeffery-Dewitt Insulator Co.') ORDER BY date ASC, patent, type

Total of 4 patents found where: Assigned To is 'Jeffery-Dewitt Insulator 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
 1934
U Specimen known 1,952,517 March 27, 1934 Insulator
Post type insulator with metal brackets bolted on with U-bolt to stack insulators or attach equipment		 STINSON, William L.
STROUP, Charles L.
 Post Type Jeffery-Dewitt Insulator Co.
U 1,976,418 October 9, 1934 Attachment for Insulators
Attachment for strain insulator		 STINSON, William L.
 Strain Jeffery-Dewitt Insulator Co.
 1935
U 2,008,341 July 16, 1935 High Tension Insulator
Suspension disk with additional cement in pinhole with asphalt coating		 STROUP, Charles L.
 Suspension Jeffery-Dewitt Insulator Co.
U 2,008,342 July 16, 1935 Insulator
Suspension disk with metal spider cap over crown cemented in porcelain		 STROUP, Charles L.
 Suspension Jeffery-Dewitt Insulator Co.

Total of 0.00 seconds