Pocket Watch Database
Patent Archive
#669763
Patent Information
Watch Balance & Hair Spring Compensate
Paul Perret
March 12, 1901
Patent #669763
| Patent Number: | 669763 |
| Description: | Watch Balance & Hair Spring Compensate |
| Inventor(s): | Paul Perret |
| Patent Date: | Mar 12, 1901 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
