Pocket Watch Database
Patent Archive
#156471
Patent Information
Watch Key
Francis E. Allen
November 3, 1874
Patent #156471
| Patent Number: | 156471 |
| Description: | Watch Key |
| Inventor(s): | Francis E. Allen |
| Patent Date: | Nov 3, 1874 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
