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: |