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 = '248') AND (category.subclass = '309.2') ORDER BY date ASC, patent, type

Total of 8 patents found where: Class is '248'; Subclass is '309.2';

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 386,986 July 31, 1888 Electric Insulator Peg
Pin (wooden) tapered below threads & to have metal rod inserted, too
JOSLIN, William E.
U Specimen known 436,120 September 9, 1890 Insulator Bracket
Bracket of metal with split threads
U 505,123 September 19, 1893 Insulator Pin
Pin (wooden) strengthened by metal rod
O'NEILL, James J.
U 527,318 October 9, 1894 Insulator Pin
Pin, wooden with internal reinforcing metal bar
BULLOCK, Edward J.
Pin 1/2 to Merwin Tuttle
U 1,157,037 October 19, 1915 Insulator Supporting Structure
Bracket stamped from sheet metal and curved upward with spring for threads
PEIRCE, JR., Charles L.
Bracket 1/2 to Hubbard & Co.
U 1,195,263 August 22, 1916 Insulator Support
Bracket, sheet metal stamped in U-bracket with attached threads
PEIRCE, JR., Charles L.
Bracket 1/2 to Hubbard & Co.
U 1,520,218 December 23, 1924 Insulator Bracket
Bracket made of stamped metal
BARNARD, Thomas A.
U 2,032,017 February 25, 1936 Sheet Metal Insulator Support Pin and Method of Making the Same
Steel sheet metal pin easily manufactured
HOCHER, Andrew A.
LASHER, Marshall
Pin Hubbard and Co.

Total of 0.01 seconds