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Patent Archive
#287710
Patent Information
Telephone Time Signal Repeat System
John M. Oram
October 30, 1883
Patent #287710
| Patent Number: | 287710 |
| Description: | Telephone Time Signal Repeat System |
| Inventor(s): | John M. Oram |
| Patent Date: | Oct 30, 1883 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
