Pocket Watch Database
Patent Archive
#22071
Patent Information
Electro Magnetic Fire Alarm Apparatus
M. Farmer
November 16, 1858
Patent #22071
| Patent Number: | 22071 |
| Description: | Electro Magnetic Fire Alarm Apparatus |
| Inventor(s): | M. Farmer |
| Assignee: | Channing W F |
| Patent Date: | Nov 16, 1858 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
