Pocket Watch Database
Patent Archive
#1488202
Patent Information
Pendulum Ball
William Gruhn
March 25, 1924
Patent #1488202
| Patent Number: | 1488202 |
| Description: | Pendulum Ball |
| Inventor(s): | William Gruhn |
| Patent Date: | Mar 25, 1924 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
