Pocket Watch Database
Patent Archive
#312848
Patent Information
Watch Duplex Escape
Hiram W. Hayden
February 24, 1885
Patent #312848
| Patent Number: | 312848 |
| Description: | Watch Duplex Escape |
| Inventor(s): | Hiram W. Hayden |
| Patent Date: | Feb 24, 1885 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
