Pocket Watch Database
Patent Archive
#2617245
Patent Information
Time System
Ervin G. Johnson
November 11, 1952
Patent #2617245
| Patent Number: | 2617245 |
| Description: | Time System |
| Inventor(s): | Ervin G. Johnson |
| Patent Date: | Nov 11, 1952 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
