Pocket Watch Database
Patent Archive
#2443558
Patent Information
Watch Main Spring Tension Indicator Etc
Carl U. Frennesen
June 15, 1948
Patent #2443558
| Patent Number: | 2443558 |
| Description: | Watch Main Spring Tension Indicator Etc |
| Inventor(s): | Carl U. Frennesen |
| Patent Date: | Jun 15, 1948 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
