Pocket Watch Database
Patent Archive
#439838
Patent Information
Clock Electric Pendulum
John H. Dyson
November 4, 1890
Patent #439838
| Patent Number: | 439838 |
| Description: | Clock Electric Pendulum |
| Inventor(s): | John H. Dyson |
| Assignee: | Wetherell Herman O |
| Patent Date: | Nov 4, 1890 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
