Pocket Watch Database
Patent Archive
#303157
Patent Information
Watch Main Spring Fastener
John Hay
August 5, 1884
Patent #303157
| Patent Number: | 303157 |
| Description: | Watch Main Spring Fastener |
| Inventor(s): | John Hay |
| Patent Date: | Aug 5, 1884 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
