Pocket Watch Database
Patent Archive
#2186451
Patent Information
Watch Crystal Install Unbreakable
Frank E. Dutcher
January 9, 1940
Patent #2186451
| Patent Number: | 2186451 |
| Description: | Watch Crystal Install Unbreakable |
| Inventor(s): | Frank E. Dutcher |
| Patent Date: | Jan 9, 1940 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
