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 = '304') ORDER BY date ASC, patent, type

Total of 7 patents found where: Class is '65'; Subclass is '304';

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
 1906
U 835,245 November 6, 1906 Press for Making Glass Insulators or Similar Glass Articles
Press for making insulators
KRIBS, Seraphin
Press Henry M. Brookfield
U 836,298 November 20, 1906 Process of Making Glass Insulators or Other Glass Articles
Process covering patent 836,297: press, fully automatic operation, measuring molten glass to annealing
BROOKFIELD, Henry M.
Press  
 1908
U 883,779 April 7, 1908 Glass Furnace and Appurtenances Thereof
Furnace for making glass insulators. Covers elements of patents 836,297 and 836,298.
BROOKFIELD, Henry M.
Furnace Brookfield Glass Co.
 1913
U 1,049,594 January 7, 1913 Press for Molding Insulators or Similar Articles
Press for making glass insulators
OLSEN, Sigward
Press Brookfield Glass Co.
 1929
U 1,712,327 May 7, 1929 Glass-Serving Apparatus
Method of delivering molten slugs of glass
BROOKE, Homer
Manufacturing  
 1940
U 2,199,356 April 30, 1940 Glassware Forming Apparatus
Glass block press
BROWN, Alvin E.
OI Owens-Illinois Glass Co.
 1957
U 2,811,815 November 5, 1957 Continuous Glass Molding Machine
Insulator press
ELDRED, John W.
Press  

Total of 0.02 seconds