Pocket Watch Database
Patent Archive
#450966
Patent Information
Watch Stop Electro Magnetic
Frank A. Matthews
April 21, 1891
Patent #450966
| Patent Number: | 450966 |
| Description: | Watch Stop Electro Magnetic |
| Inventor(s): | Frank A. Matthews |
| Patent Date: | Apr 21, 1891 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
