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. 20, 2004
Filed:
Mar. 01, 2002
Applicant:
Inventors:
Hirotaka Obata, Hiratsuka, JP;
Naohiko Gonmori, Yokohama, JP;
Takahiro Tajima, Tokyo, JP;
Hiroyuki Nakagawa, Narashino, JP;
Makoto Ijichi, Yokohama, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01C 2/126 ;
U.S. Cl.
CPC ...
G01C 2/126 ;
Abstract
A technology is provided for timely reporting on vehicle positions to a control center without unnecessary spending on communication costs. The positions of a plurality of moving bodies which are being managed are detected. Determinations are made on whether or not the positions of these moving bodies are within specified multi-stage distance ranges. As a result of this determination, when the position of the moving body enters into a distance range for one of the stages, the position of this moving body is wirelessly reported to a control center.