Pocket Watch Database
Patent Archive
#512470
Patent Information
Metronome
John T. Hanson
January 9, 1894
Patent #512470
| Patent Number: | 512470 |
| Description: | Metronome |
| Inventor(s): | John T. Hanson |
| Assignee: | Crump Ernest Radclyffe |
| Patent Date: | Jan 9, 1894 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
