Pocket Watch Database
Patent Archive
#1181510
Patent Information
Watch Hair Spring Compensator & Regulator
Howard M. Groff
George F. Eberhard
May 2, 1916
Patent #1181510
| Patent Number: | 1181510 |
| Category: | Regulators |
| Description: | Watch Hair Spring Compensator & Regulator |
| Inventor(s): |
Howard M. Groff George F. Eberhard |
| Assignee: | Robt H Ingersoll & Bros |
| Patent Date: | May 2, 1916 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
