发明名称 |
Device for protecting audio equipment in vehicle against theft |
摘要 |
A device for protecting audio equipment adapted to be installed in an automobile against theft includes a code storage section for previously storing a specific code in a memory, a code entry section for entering a code when the audio equipment is to be operated, a comparator circuit for comparing the code entered from the code entry section with the code read from the memory, and a muting circuit that usually mutes the electrical signal which would otherwise be applied to the power amplifier of the audio equipment. Unless the specific code is entered from the code entry section, the audio equipment is made inoperative by the electronic lock.
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申请公布号 |
US4683462(A) |
申请公布日期 |
1987.07.28 |
申请号 |
US19840669103 |
申请日期 |
1984.11.07 |
申请人 |
ALPINE ELECTRONICS INC. |
发明人 |
TAKEDA, KAZUMA;IGARASHI, TSUTOMU |
分类号 |
B60Q5/00;B60R11/02;G08B13/00;G08B13/14;G08B13/22;G08B15/00;G11B15/02;(IPC1-7):G08B13/14;G06F7/04 |
主分类号 |
B60Q5/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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