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:
Sep. 20, 1994
Filed:
Jun. 30, 1992
Morito Yamada, Hamamatsu, JP;
Yamaha Corporation, , JP;
Abstract
A car audio apparatus mounted on an automobile and having a function for preventing theft, the car audio apparatus includes a main body portion fixed to the automobile and a front panel detachably mounted to the main body portion of the audio apparatus. The main body portion has a CPU and a first memory for storing a first secret code and the front panel has a second memory for storing a second secret code. The CPU is capable of respectively reading out the first and second secret codes from the first and second memories and comparing the first secret code with the second secret code so that when both secret codes agree, the CPU enables operation of the car audio apparatus and when both of the secret codes do not agree, the CPU inhibits the operation of the car audio apparatus.