Pocket Watch Database
Patent Archive
#982021
Patent Information
Recorder Speed
Alva D. Renfro
January 17, 1911
Patent #982021
| Patent Number: | 982021 |
| Description: | Recorder Speed |
| Inventor(s): | Alva D. Renfro |
| Assignee: | Renfro Speed-o-meter Co |
| Patent Date: | Jan 17, 1911 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
