Pocket Watch Database
Patent Archive
#337690
Patent Information
Watch Spring Mfg
John Logan
March 9, 1886
Patent #337690
| Patent Number: | 337690 |
| Description: | Watch Spring Mfg |
| Inventor(s): | John Logan |
| Patent Date: | Mar 9, 1886 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
