Pocket Watch Database
Patent Archive
#397423
Patent Information
Watch Demagnetic
John Greaves
February 5, 1889
Patent #397423
| Patent Number: | 397423 |
| Description: | Watch Demagnetic |
| Inventor(s): | John Greaves |
| Patent Date: | Feb 5, 1889 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
