Pocket Watch Database
Patent Archive
#224243
Patent Information
Clock Electro Magnetic
D. Fred Sweet
February 3, 1880
Patent #224243
| Patent Number: | 224243 |
| Description: | Clock Electro Magnetic |
| Inventor(s): | D. Fred Sweet |
| Assignee: | Upjahn William E |
| Patent Date: | Feb 3, 1880 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
