Pocket Watch Database
Patent Archive
#305821
Patent Information
Watch Hair Spring Regulate Pin
George F. Johnson
September 30, 1884
Patent #305821
| Manufacturer: | Aurora Watch Co. |
| Patent Number: | 305821 |
| Description: | Watch Hair Spring Regulate Pin |
| Inventor(s): | George F. Johnson |
| Patent Date: | Sep 30, 1884 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
