Pocket Watch Database
Patent Archive
#618336
Patent Information
Metronome
Jacob C. Doerfer
January 24, 1899
Patent #618336
| Patent Number: | 618336 |
| Description: | Metronome |
| Inventor(s): | Jacob C. Doerfer |
| Patent Date: | Jan 24, 1899 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
