Pocket Watch Database
Patent Archive
#1540775
Patent Information
Recorder Watch Man Electric
Edwin L. Grauel
June 9, 1925
Patent #1540775
| Patent Number: | 1540775 |
| Description: | Recorder Watch Man Electric |
| Inventor(s): | Edwin L. Grauel |
| Assignee: | Automatic Electric Co |
| Patent Date: | Jun 9, 1925 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
