Pocket Watch Database
Patent Archive
#1392676
Patent Information
Timepiece Main Spring Barrel
Helge A. Borrensen
October 4, 1921
Patent #1392676
| Patent Number: | 1392676 |
| Description: | Timepiece Main Spring Barrel |
| Inventor(s): | Helge A. Borrensen |
| Patent Date: | Oct 4, 1921 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
