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:
Nov. 30, 2004
Filed:
Aug. 02, 2001
Applicant:
Inventors:
Tatsuaki Osafune, Yokohama, JP;
Katsuyoshi Kitai, Inagi, JP;
Tohru Hoshi, Yokohama, JP;
Tomohiro Hotta, Yokohama, JP;
Koji Hirayama, Chigasaki, JP;
Assignee:
Hitachi, Ltd, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04Q 7/28 ;
U.S. Cl.
CPC ...
H04Q 7/28 ;
Abstract
A communication relay system is connected to a line switched mobile communication system adapted to accommodate therein mobile terminals through radio channels and a packet switched mobile communication system adapted to accommodate therein the mobile terminals through radio channels. When a connection request has been made to a portable terminal, the communication relay system judges whether the portable terminal of interest is connected either to the line switched mobile communication system or to the packet switched mobile communication system.