Communications device with movable element control interface
US5175759A · kind A · utility
87Cited by
27References
4Claims
0Family size
Inventors
Key dates
| Filing date | Nov 20, 1989 |
| Grant date | Dec 29, 1992 |
| Priority date | — |
| Expiry date | Nov 20, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A portable radiotelephone with a keypad, alphanumeric character display, and hands free function is disclosed. A movable flip element of the housing covers a keypad and other control buttons when in a closed, on-hook, position and activates the illumination of the keypad, enables the display, and enables the hands free function when in an open, off-hook, position. The duration of keypad illumination and display activation are timed to reduce battery drain and the hands free function may be deactivated with a hookswitch flash.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.