Pocket Watch Database
Patent Archive
#474590
Patent Information
Watch Make Bimetallic Balance
Duane H. Church
May 10, 1892
Patent #474590
| Manufacturer: | Waltham |
| Patent Number: | 474590 |
| Description: | Watch Make Bimetallic Balance |
| Inventor(s): | Duane H. Church |
| Patent Date: | May 10, 1892 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
