Pocket Watch Database
Patent Archive
#781339
Patent Information
Timer Electric Circuit
Jacob Jr Helmstadter
January 31, 1905
Patent #781339
| Patent Number: | 781339 |
| Description: | Timer Electric Circuit |
| Inventor(s): | Jacob Jr Helmstadter |
| Patent Date: | Jan 31, 1905 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
