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 = 'SLEEMAN') AND (first_name = 'Harold P.') ORDER BY date ASC, patent, type

Total of 3 patents found where: Last Name is 'SLEEMAN'; First Name is 'Harold P.';

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
 1930
U 1,755,032 April 15, 1930 Insulator
Post insulator made up of Hewlett disks		 SLEEMAN, Harold P.
 Post Type The R. Thomas & Sons Co.
U 1,760,786 May 27, 1930 Coupling for Insulators
Two part metal coupling to link Hewlett disks together		 SLEEMAN, Harold P.
 Suspension The R. Thomas & Sons Co.
 1939
U 2,154,387 April 11, 1939 Electric Insulator
RFI: coat crown with metallic glaze to prevent radio interference (advertised in Electrical World 8-12-1939)		 SLEEMAN, Harold P.
 RFI The R. Thomas & Sons Co.

Total of 0.00 seconds