Pocket Watch Database
Patent Archive
#136435
Patent Information
Metronome
John A. Heckenbach
April 4, 1873
Patent #136435
| Patent Number: | 136435 |
| Description: | Metronome |
| Inventor(s): | John A. Heckenbach |
| Patent Date: | Apr 4, 1873 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
