Pocket Watch Database
Patent Archive
#1676030
Patent Information
Clock Dial 24 Hr
Francis A. Helin
July 3, 1928
Patent #1676030
| Patent Number: | 1676030 |
| Description: | Clock Dial 24 Hr |
| Inventor(s): | Francis A. Helin |
| Patent Date: | Jul 3, 1928 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
