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:
Jan. 03, 1995
Filed:
Mar. 30, 1993
Naruhiko Sakamoto, Kokubunji, JP;
Casio Computer Co., Ltd., Tokyo, JP;
Abstract
A radio telephone system is comprised of a communication network, a cordless telephone apparatus and a plurality of public radio base stations, both being connected to the communication network, and a handset unit of the cordless telephone apparatus is capable of exchanging messages with the plurality of public radio base stations. The cordless telephone apparatus is provided with a control-data storage unit for storing data of controlling handsets unit belonging to the cordless telephone apparatus. The control-data storage unit stores data each comprising a combination of an extension number and a phone number of a handset unit. The cordless telephone apparatus judges whether a handset unit to be reached is in a service area of the apparatus, when the handset unit is called from another handset unit of the cordless telephone apparatus. When it is determined that the handset unit to be reached is not in the service area, the cordless telephone apparatus makes an outside-line calling based on the phone number stored in the control-data storage to reach the handset unit through the public radio base station.