Pocket Watch Database
Patent Archive
#100245
Patent Information
Watch Main Spring Barrel
John P. Allen
March 1, 1870
Patent #100245
| Patent Number: | 100245 |
| Description: | Watch Main Spring Barrel |
| Inventor(s): | John P. Allen |
| Patent Date: | Mar 1, 1870 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
