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 = 'HILLIARD') AND (first_name = 'John D.') ORDER BY date ASC, patent, type

Total of 3 patents found where: Last Name is 'HILLIARD'; First Name is 'John D.';

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
 1909
U 914,837 March 9, 1909 Line Support
Tie wires wrapped around the neck of the insulator and clamped to the conductor on each end.
HILLIARD, John D.
Tie Wire  
 1912
U 1,015,229 January 16, 1912 Insulator
Suspension using multiple parts cemented together on tubular core. The patent is similar to the commonly referred ""Micarta Core"" insulators, but experts believe the patent was not used for those insulators. The glass insulators may have been made by Hemingray.
HILLIARD, John D.
PARSONS, Charles E.
Suspension J. E. Way
 1913
U 1,069,782 August 12, 1913 Electric Insulator
Multipart cable clamp using metal crown cap
HILLIARD, John D.
Multipart  

Total of 0.00 seconds