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: |