Portable radiotelephone with control switch disabling
US4845772A · kind A · utility
133Cited by
6References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1988 |
| Grant date | Jul 4, 1989 |
| Priority date | — |
| Expiry date | Jun 13, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A portable radiotelephone with control switch disabling is disclosed. A flip element which contains a microphone and covers a keypad and other control buttons when in a closed position also activates a hookswitch. When the hookswitch and microprocessor indicate that the flip element is in a closed position, the on/off switch cannot be activated to turn the portable radiotelephone on or off and switches which control volume level are deactivated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.