Portable telephone with power source/mode change during calls
US5036532A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1990 |
| Grant date | Jul 30, 1991 |
| Priority date | — |
| Expiry date | Dec 27, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A unique cellular portable telephone (100) automatically accommodates a power source change during a cellular telephone call between the portable's battery (300) and another battery or an external power source from vehicular adaptor (200), such as, for example, a battery eliminator adaptor, a hands-free adaptor, or a mobile transceiver adaptor. The operating mode of portable telephone (100) also automatically changes when it is coupled to or decoupled from vehicular adaptor (200) during a cellular telephone call. For example, when vehicular adaptor (200) is plugged into portable telephone (100), the portable display (116) is not disabled when inactive for a predetermined time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.