Pocket Watch Database
Patent Archive
#2155646
Patent Information
Watch Rate Recorder
Charles H. Fetter
John G. Matthews
April 25, 1939
Patent #2155646
| Patent Number: | 2155646 |
| Description: | Watch Rate Recorder |
| Inventor(s): |
Charles H. Fetter John G. Matthews |
| Assignee: | Electric Research Products Inc |
| Patent Date: | Apr 25, 1939 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
