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 WHERE (category = 'Threads') ORDER BY date ASC, patent, type

Total of 2 patents found where: Category is 'Threads';

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
 1877
U 196,733 October 30, 1877 Improvement in Forming Female Screw Threads in Glass Jars, Insulators, & c.
Method of forming female threads inside the neck of jars and insulators
WOODWARD, Theodore F.
Threads  
 1905
U 807,459 December 19, 1905 Process of Forming Glass Articles
Threading process using fusible metal to form threads in glass before it melts
HARLOE, Morton
Threads 1/3 to Harry P. Decker

Total of 0.00 seconds