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 name ON name.patent = patent.patent AND name.type = patent.type WHERE (last_name = 'JEFFERY') AND (first_name = 'Benjamin A.') ORDER BY date ASC, patent, type

Total of 2 patents found where: Last Name is 'JEFFERY'; First Name is 'Benjamin A.';

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
 1916
U 1,186,203 June 6, 1916 Apparatus for Use in Manufacturing Articles of Ceramic Material
Method of manufacturing spark plugs		 JEFFERY, Joseph A.
JEFFERY, Benjamin A.
 Manufacturing  
 1917
U 1,223,792 April 24, 1917 Apparatus for Use in Manufacturing Articles of Ceramic Material
Machine for manufacturing spark plugs		 JEFFERY, Joseph A.
JEFFERY, Benjamin A.
 Manufacturing  

Total of 0.00 seconds