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 = 'DEHMEL') AND (first_name = 'Richard C.') ORDER BY date ASC, patent, type

Total of 2 patents found where: Last Name is 'DEHMEL'; First Name is 'Richard C.';

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
 1938
U 2,138,571 November 29, 1938 Insulator
Transposition for telephone line		 DEHMEL, Richard C.
 Transposition Bell Telephone Laboratories, Inc.
 1941
U 2,248,044 July 8, 1941 Transposition Insulator
Transposition insulator with channels for two line wires to cross over within the insulator		 DEHMEL, Richard C.
 Transposition Bell Telephone Laboratories, Inc.

Total of 0.00 seconds