Pocket Watch Database
Patent Archive
#3486323
Patent Information
Metronome Damage Resistant
Frederick Franz
December 30, 1969
Patent #3486323
| Patent Number: | 3486323 |
| Description: | Metronome Damage Resistant |
| Inventor(s): | Frederick Franz |
| Patent Date: | Dec 30, 1969 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
