Pocket Watch Database
Patent Archive
#862321
Patent Information
Watch Safety
Adolph Ehrentreu
August 6, 1907
Patent #862321
| Patent Number: | 862321 |
| Description: | Watch Safety |
| Inventor(s): | Adolph Ehrentreu |
| Patent Date: | Aug 6, 1907 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
