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:
Apr. 17, 2001
Filed:
Jun. 10, 1998
Noritoshi Furuta, Okazaki, JP;
Fumio Asakura, Okazaki, JP;
Hiroto Uesaka, Okazaki, JP;
Yuji Kato, Handa, JP;
Mitsugi Ohtsuka, Kariya, JP;
Other;
Abstract
In a vehicular entry control system, a code signal transmitter of a card carried by a driver modulates by a card-specific code a signal received from a transmitter/receiver of a control unit mounted in a vehicle and transmits the modulated signal to the control unit in return. The transmitter/receiver demodulates the modulated signal and a microcomputer automatically unlocks a vehicle door when the demodulated signal is correct indicating that the card is carried into a demodulating area. The microcomputer locks the door upon a driver's manual operation on a locking switch of the card. The microcomputer prohibits the automatic unlocking as long as the card is within the demodulating area after the locking in response to the manual operation.