Pocket Watch Database
Patent Archive
#278357
Patent Information
Time Signal For Telephone
John M. Oram
May 29, 1883
Patent #278357
| Patent Number: | 278357 |
| Description: | Time Signal For Telephone |
| Inventor(s): | John M. Oram |
| Patent Date: | May 29, 1883 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
