Pocket Watch Database
Patent Archive
#3120735
Patent Information
Timer Sand Glass Telephone
Means Sidney A. Mc
February 11, 1964
Patent #3120735
| Patent Number: | 3120735 |
| Description: | Timer Sand Glass Telephone |
| Inventor(s): | Means Sidney A. Mc |
| Patent Date: | Feb 11, 1964 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
