Pocket Watch Database
Patent Archive
#397504
Patent Information
Watch Main Spring
Ernest Karthaus
February 12, 1889
Patent #397504
| Patent Number: | 397504 |
| Description: | Watch Main Spring |
| Inventor(s): | Ernest Karthaus |
| Patent Date: | Feb 12, 1889 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
