Pocket Watch Database
Patent Archive
#503480
Patent Information
Watch Safety
Henry S. Hopper
August 15, 1893
Patent #503480
| Patent Number: | 503480 |
| Description: | Watch Safety |
| Inventor(s): | Henry S. Hopper |
| Patent Date: | Aug 15, 1893 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
