Call deferral system for telephones
US4893329A · kind A · utility
76Cited by
7References
21Claims
0Family size
Inventor
Key dates
| Filing date | Sep 20, 1988 |
| Grant date | Jan 9, 1990 |
| Priority date | — |
| Expiry date | Sep 20, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2203/2072
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A telephone call deferral system which allows incoming telephone calls to be deferred for a user selected period or until a user selected time. During the defer time, incoming calls are intercepted, the ring sound is suppressed, and the caller receives a voice message indicating that calls are not currently being received but will be at the specified defer time. Programming of the defer mode of operation is effected from the key pad of any telephone instrument connected with the telephone line of the user. An override system allows emergency calls to be completed from parties in possession of a special access code.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.