Pocket Watch Database
Patent Archive
#1368118
Patent Information
Watch Escape Depth Adjuster
Jean F. Hartwell
Fred R. Coats
February 8, 1921
Patent #1368118
| Patent Number: | 1368118 |
| Description: | Watch Escape Depth Adjuster |
| Inventor(s): |
Jean F. Hartwell Fred R. Coats |
| Patent Date: | Feb 8, 1921 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
