Pocket Watch Database
Patent Archive
#311894
Patent Information
Watch Case Spring
Arthur Grandjean
February 10, 1885
Patent #311894
| Patent Number: | 311894 |
| Description: | Watch Case Spring |
| Inventor(s): | Arthur Grandjean |
| Patent Date: | Feb 10, 1885 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
