Pocket Watch Database
Patent Archive
#151021
Patent Information
Watch Case Spring
John Harwood
May 19, 1874
Patent #151021
| Patent Number: | 151021 |
| Description: | Watch Case Spring |
| Inventor(s): | John Harwood |
| Patent Date: | May 19, 1874 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
