Patent ID: 7274979

Claim:
An anti-theft apparatus, comprising: memory media to be carried by a person demanding permission to utilize a vehicle; and an immobilizer provided in said vehicle, wherein said memory media includes: a memory unit storing user identification data being indicative of said person demanding permission to utilize said vehicle; and a communication unit for wirelessly transmitting said user identification data to said immobilizer, and said immobilizer includes: communication means for receiving said user identification data from said memory media; user identification data storing means for storing user identification data being indicative of a registered user having permission to utilize said vehicle; identifying means for judging whether or not said person is identical to said registered user on the basis of the comparison between said user identification data received from said memory media and said user identification data stored in said user identification data storing means; driving state detecting means for detecting whether said vehicle is in a traveling state, or in a stopped state; and locking and unlocking means for controlling a gear shifter provided in said vehicle on the basis of the judgment of said identifying means, said locking and unlocking means being adapted to assume two different operation states including a locking state to lock said gear shifter to prevent said gear shifter from being shifted from a neutral state or a parking state when the judgment is made that said person is identified as said unregistered user under the condition that said vehicle is in said stopped state, and an unlocking state to unlock said gear shifter to allow said gear shifter to be shifted from a neutral state or a parking state when the judgment is made that said person is identified as said registered user under the condition that said vehicle is in said stopped state.