Pocket Watch Database
Patent Archive
#1899113
Patent Information
Timer Electric Circuit
Erich Schaefer
February 28, 1933
Patent #1899113
| Patent Number: | 1899113 |
| Description: | Timer Electric Circuit |
| Inventor(s): | Erich Schaefer |
| Patent Date: | Feb 28, 1933 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
