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:
Jul. 15, 2008
Filed:
Dec. 16, 2005
Masato Sumida, Tokyo, JP;
Masayoshi Ono, Tokyo, JP;
Tetsuya Ooba, Tokyo, JP;
Masahiko Katayama, Tokyo, JP;
Naohisa Uehara, Tokyo, JP;
Masato Sumida, Tokyo, JP;
Masayoshi Ono, Tokyo, JP;
Tetsuya Ooba, Tokyo, JP;
Masahiko Katayama, Tokyo, JP;
Naohisa Uehara, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A communication apparatus for a vehicle can achieve an inexpensive technique for determining whether a portable unit exists inside or outside the vehicle without depending upon LF band radio waves through contactless communication using high frequency band radio waves by separating a reader function of a reader/writer into the portable unit and an on-board unit. The apparatus includes at least one ID transmitter installed on a vehicle and sends a transmitter ID possessed by itself in response to reception of a radio wave, an on-board unit installed on the vehicle for radiating a radio wave to the ID transmitter, a portable unit that receives the transmitter ID sent by the ID transmitter, and an ID communication section for sending the transmitter ID from the portable unitto the on-board unit. The on-board unit determines the position of the portable unit based on the transmitter ID received from the portable unit.