Pocket Watch Database
Patent Archive
#1822813
Patent Information
Clock Talk
Erich F. Jahnke
September 8, 1931
Patent #1822813
| Patent Number: | 1822813 |
| Description: | Clock Talk |
| Inventor(s): | Erich F. Jahnke |
| Patent Date: | Sep 8, 1931 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
