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 = '65') AND (category.subclass = '307') ORDER BY patent ASC, type

Total of 3 patents found where: Class is '65'; Subclass is '307';

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
 1899
U 622,270 April 4, 1899 Machine for Making Hollow Glassware
Glass Press that can be adapted for insulator manufacture
ROWE, John T.
Misc  
 1932
U 1,844,549 February 9, 1932 Glass Working Machine
Press for making glass insulators
HEADLEY, Benjamin T.
DU BOIS, David Irvin
KOOB, Bernard H.
LOBB, Frank H.
Press Whitall Tatum Co.
 1961
U 2,975,554 March 21, 1961 Press Mold and Method of Operation
Insulator press for CD 1049
STUTSKE, William A.
TOROK, Julius J.
Press Owens-Illinois Glass Co.

Total of 0.01 seconds