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 = '198') AND (category.subclass = '582') ORDER BY description ASC, date, patent, type

Total of 1 patents found where: Class is '198'; Subclass is '582';

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 826,139 July 17, 1906 Device for Mixing Ingredients for Making Glass and for Feeding them to Furnaces
Mixer for mixing ingredients for glass insulators
BROOKFIELD, Henry M.
Mixer  

Total of 0.01 seconds