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:
Aug. 08, 2000
Filed:
Feb. 27, 1998
Applicant:
Inventors:
Seijiro Ishizuka, Tokyo, JP;
Masatoshi Kozera, Kanagawa, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04Q / ;
U.S. Cl.
CPC ...
455457 ; 455566 ; 455414 ; 455518 ;
Abstract
A base station calculates distances to respective mobile stations and transmits the distances, and a control station determines positions of respective mobile stations based on the distances between plural base stations and respective mobile stations. The control station previously stores the same identification code for specific plural mobile stations, and examines whether or not any other mobile station having the same identification code exists within a range scale designated by one of the specific plural mobile stations, and then gives notice of the search result to one of specific plural mobile stations via the base station.