Pocket Watch Database
Patent Archive
#143847
Patent Information
Clock Electric
Frederick J. Ritchie
October 21, 1873
Patent #143847
| Patent Number: | 143847 |
| Description: | Clock Electric |
| Inventor(s): | Frederick J. Ritchie |
| Patent Date: | Oct 21, 1873 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
