Pocket Watch Database
Patent Archive
#497429
Patent Information
Watch Main Spring
John B. Jobson
May 16, 1893
Patent #497429
| Patent Number: | 497429 |
| Description: | Watch Main Spring |
| Inventor(s): | John B. Jobson |
| Patent Date: | May 16, 1893 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
