Pocket Watch Database
Patent Archive
#452728
Patent Information
Recorder Work Man
Thomas J. Parkinson
May 19, 1891
Patent #452728
Patent Number: | 452728 |
Description: | Recorder Work Man |
Inventor(s): | Thomas J. Parkinson |
Assignee: | Baum John R |
Patent Date: | May 19, 1891 |
Registration Type: | Patent |
External Research: | https://www.google.c… |
Patent Document: |