Pocket Watch Database
Patent Archive
#350584
Patent Information
Watch Hair Spring Isochronal
Charles E. Fritts
October 12, 1886
Patent #350584
| Patent Number: | 350584 |
| Description: | Watch Hair Spring Isochronal |
| Inventor(s): | Charles E. Fritts |
| Patent Date: | Oct 12, 1886 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
