Pocket Watch Database
Patent Archive
#250273
Patent Information
Machine Watch Demagnetize
Hiram S. Maxim
November 29, 1881
Patent #250273
| Patent Number: | 250273 |
| Description: | Machine Watch Demagnetize |
| Inventor(s): | Hiram S. Maxim |
| Patent Date: | Nov 29, 1881 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
