Pocket Watch Database
Patent Archive
#2160006
Patent Information
Time Record Device
Louie T. E. Thompson
Nils A. Riffolt
May 30, 1939
Patent #2160006
| Patent Number: | 2160006 |
| Description: | Time Record Device |
| Inventor(s): |
Louie T. E. Thompson Nils A. Riffolt |
| Patent Date: | May 30, 1939 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
