Pocket Watch Database
Patent Archive
#971500
Patent Information
Watch Movement Ratchet Mech
Howard Metzler Groff
September 27, 1910
Patent #971500
| Manufacturer: | E Howard Watch Co (Keystone) |
| Patent Number: | 971500 |
| Description: | Watch Movement Ratchet Mech |
| Inventor(s): | Howard Metzler Groff |
| Assignee: | Keystone Watch Case Co |
| Patent Date: | Sep 27, 1910 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
