Pocket Watch Database
Patent Archive
#1020420
Patent Information
Reocrder Train Man
Frank Hedley
James S. Doyle
March 19, 1912
Patent #1020420
Patent Number: | 1020420 |
Description: | Reocrder 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: |