Pocket Watch Database
Patent Archive
#157913
Patent Information
Watch Center Pinion
Dietrich Gruen
December 22, 1874
Patent #157913
| Manufacturer: | Columbus Watch Co. |
| Patent Number: | 157913 |
| Category: | Safety Pinion |
| Description: | Watch Center Pinion |
| Inventor(s): | Dietrich Gruen |
| Patent Date: | Dec 22, 1874 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
