Pocket Watch Database
Patent Archive
#329915
Patent Information
Watch Test & Grade Balance Wheel
John Logan
November 10, 1885
Patent #329915
| Patent Number: | 329915 |
| Description: | Watch Test & Grade Balance Wheel |
| Inventor(s): | John Logan |
| Patent Date: | Nov 10, 1885 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
