Pocket Watch Database
Patent Archive
#190230
Patent Information
Watch Hair Spring Stud
Francis M. Martin
May 1, 1877
Patent #190230
| Patent Number: | 190230 |
| Description: | Watch Hair Spring Stud |
| Inventor(s): | Francis M. Martin |
| Assignee: | Martin Francis M |
| Patent Date: | May 1, 1877 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
