Car audio device
US5109420A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 9, 1990 |
| Grant date | Apr 28, 1992 |
| Priority date | — |
| Expiry date | Mar 9, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/202
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A car audio device of the present invention is divided into at least two parts comprising a body part and an operational part which is detachable from the body part. The body part has a system controller, and the operational part has a key input controller for outputting an operation signal to the system controller. The body part and the operational part are detachably connected to each other by a mechanical mechanism, and the signal lines for these parts are electrically connected to each other through detachable contact terminals. The operational part has a gate part which selects the signal from either the key input controller or the remote control receiver. The signal selected is transmitted to the system controller through a common transmission line used by the key input controller and the remote control receiver in common.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.