Pocket Watch Database
Patent Archive
#154636
Patent Information
Watch Case Back
Henry Birnn
September 1, 1874
Patent #154636
| Patent Number: | 154636 |
| Description: | Watch Case Back |
| Inventor(s): | Henry Birnn |
| Patent Date: | Sep 1, 1874 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
