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. 08, 2015
Filed:
Oct. 14, 2005
Masayoshi Ono, Tokyo, JP;
Masato Sumida, Tokyo, JP;
Tetsuya Ooba, Tokyo, JP;
Masahiko Katayama, Tokyo, JP;
Naohisa Uehara, Tokyo, JP;
Masayoshi Ono, Tokyo, JP;
Masato Sumida, 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 achieves reduction in size and cost of a portable unit by making unnecessary an oscillation circuit and a battery in the portable unit. The apparatus is provided with an on-board unit installed on the vehicle and a portable unit carried by a user of the vehicle. A response signal is sent from the portable unit to the on-board unit in response to a signal transmitted from the on-board unit. The portable unit includes a power generation circuit for supplying electric power to circuits in the portable unit by a power generation radio wave sent from the on-board unit, and the on-board unit sends a communication signal after sending the power generation radio wave.