Pocket Watch Database
Patent Archive
#673020
Patent Information
Clock Electric Pendulum
Friedrich Haenichen
Otto A. Haenichen
April 30, 1901
Patent #673020
| Patent Number: | 673020 |
| Description: | Clock Electric Pendulum |
| Inventor(s): |
Friedrich Haenichen Otto A. Haenichen |
| Patent Date: | Apr 30, 1901 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
