The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 28, 1993
Filed:
Mar. 03, 1993
Applicant:
Inventor:
Tsutomu Sato, Iwaki, JP;
Assignee:
Alpine Electronics, Inc., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60R / ;
U.S. Cl.
CPC ...
340430 ; 340426 ; 340429 ; 340539 ; 340541 ; 3408255 ; 455 71 ; 455254 ;
Abstract
A security device includes a portable transmission unit that gives an instruction to start or stop security, a sensor that detects an abnormality of a tuner which receives a signal from the transmission unit and of an automobile, a sensor circuit having predetermined characteristics for discriminating the output of the sensor, and a security control section for causing a theft prevention device like a siren to be activated after output from the sensor circuit is received, wherein the characteristics of the sensor circuit can be set by the transmission unit.