Pocket Watch Database
Patent Archive
#1525781
Patent Information
Timer Ventilator
Ferdinand F. Sheppard
February 10, 1925
Patent #1525781
| Patent Number: | 1525781 |
| Description: | Timer Ventilator |
| Inventor(s): | Ferdinand F. Sheppard |
| Patent Date: | Feb 10, 1925 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
