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. 04, 1990
Filed:
Mar. 31, 1989
Applicant:
Inventor:
Yukiji Yamauchi, Kokubunji, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04Q / ;
U.S. Cl.
CPC ...
379 59 ; 455 33 ; 379 63 ;
Abstract
A system configuration of wireless PBX (Private Branch Exchange) and communication method therefor with high user facility. In the system configuration of wireless PBX and communication method therefor, a specified telephone number is assigned to each portable radio telephone and also to each radio base station disposed at a predetermined area interval. Not only a person can issue a call by designating another subscriber to a portable radio telephone, but also the person can call an arbitrary subscriber to a portable radio telephone present near at an arbitrary radio base station.