Pocket Watch Database
Patent Archive
#1020419
Patent Information
Recorder Train Man
Frank Hedley
James S. Doyle
March 19, 1912
Patent #1020419
| Patent Number: | 1020419 |
| Description: | Recorder Train Man |
| Inventor(s): |
Frank Hedley James S. Doyle |
| Patent Date: | Mar 19, 1912 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
