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:
Feb. 20, 2007
Filed:
Sep. 13, 1999
Takao Ogawa, Yokohama, JP;
Kazuhiro Morisaki, Fujinomiya, JP;
Koji Nishikigi, Kawasaki, JP;
Shigeki Kaneko, Fujisawa, JP;
Shinichiro Kawasaki, Yokohama, JP;
Hirokazu Wada, Yokohama, JP;
Kenji Yaegashi, Kawasaki, JP;
Seiji Fuyama, Yokahama, JP;
Takao Ogawa, Yokohama, JP;
Kazuhiro Morisaki, Fujinomiya, JP;
Koji Nishikigi, Kawasaki, JP;
Shigeki Kaneko, Fujisawa, JP;
Shinichiro Kawasaki, Yokohama, JP;
Hirokazu Wada, Yokohama, JP;
Kenji Yaegashi, Kawasaki, JP;
Seiji Fuyama, Yokahama, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An ETC (electronic toll collection) system includes an antenna having a predetermined directivity for providing a limited radio-communication service zone. A vehicle sensor operates for detecting a vehicle which reaches a predetermined position in the limited radio-communication service zone. A radio signal is transmitted via the antenna. A decision is made as to whether or not a radio response to the radio signal is received via the antenna. In cases where a radio response to the radio signal is received, it is judged that there is an ETC vehicle incoming. In cases where the vehicle sensor detects a vehicle while a radio response to the radio signal is not received, it is judged that there is a non-ETC vehicle incoming.