Pocket Watch Database
Patent Archive
#221180
Patent Information
Hair Spring Stud
John P. Doherty
Newton Monday
November 4, 1879
Patent #221180
| Patent Number: | 221180 |
| Description: | Hair Spring Stud |
| Inventor(s): |
John P. Doherty Newton Monday |
| Patent Date: | Nov 4, 1879 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
