Pocket Watch Database
Patent Archive
#457681
Patent Information
Timekeeper Balance Staff
James E. Swarthout
August 11, 1891
Patent #457681
| Patent Number: | 457681 |
| Description: | Timekeeper Balance Staff |
| Inventor(s): | James E. Swarthout |
| Patent Date: | Aug 11, 1891 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
