Pocket Watch Database
Patent Archive
#239387
Patent Information
Watch Regulator
John A. Johnson
March 29, 1881
Patent #239387
| Patent Number: | 239387 |
| Category: | Regulators |
| Description: | Watch Regulator |
| Inventor(s): | John A. Johnson |
| Patent Date: | Mar 29, 1881 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
