Cellular telephone with programmable authorized telephone number
US6912399B2 · kind B2 · utility
83Cited by
121References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2001 |
| Grant date | Jun 28, 2005 |
| Priority date | — |
| Expiry date | Sep 12, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/724
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A cellular telephone having restricted dialing authority and a simplified keypad. The keypad includes a plurality of preprogrammed hot keys. Incoming telephone calls from authorized telephone numbers are answerable and incoming telephone calls from other numbers do not ring. The authorized telephone numbers are programmable. In one embodiment, predetermined encoded messages can be transmitted silently.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.