Pocket Watch Database
Patent Archive
#451808
Patent Information
Watch Balance Staff
Jonathan H. Cooper
May 5, 1891
Patent #451808
| Patent Number: | 451808 |
| Description: | Watch Balance Staff |
| Inventor(s): | Jonathan H. Cooper |
| Patent Date: | May 5, 1891 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
