Pocket Watch Database
Patent Archive
#871671
Patent Information
Timer Electric Circuit
Charles E. Cambell
November 19, 1907
Patent #871671
| Patent Number: | 871671 |
| Description: | Timer Electric Circuit |
| Inventor(s): | Charles E. Cambell |
| Patent Date: | Nov 19, 1907 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
