Pocket Watch Database
Patent Archive
#174031
Patent Information
Main Spring Safety Device
John J. Thornton
February 22, 1876
Patent #174031
| Patent Number: | 174031 |
| Description: | Main Spring Safety Device |
| Inventor(s): | John J. Thornton |
| Assignee: | Ridgway Daniel H |
| Patent Date: | Feb 22, 1876 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
