Pocket Watch Database
Patent Archive
#2554029
Patent Information
Timepiece Automatic Speed Regulator
Robert Ellsworth Holdman
May 22, 1951
Patent #2554029
| Patent Number: | 2554029 |
| Description: | Timepiece Automatic Speed Regulator |
| Inventor(s): | Robert Ellsworth Holdman |
| Patent Date: | May 22, 1951 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
