Pocket Watch Database
Patent Archive
#1321821
Patent Information
Clock Spring Motor
Augustus L. Hahl
November 18, 1919
Patent #1321821
| Patent Number: | 1321821 |
| Description: | Clock Spring Motor |
| Inventor(s): | Augustus L. Hahl |
| Patent Date: | Nov 18, 1919 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
