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. 25, 1989
Filed:
Jun. 15, 1988
Toshihiko Shibata, Yokohama, JP;
Mitsuo Sato, Yokohama, JP;
Yoshitoshi Murata, Yokohama, JP;
Noriaki Nagashima, Kawasaki, JP;
Matsushita Communication Industrial Co., Ltd., Yokohama, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A radio telephone system has a radio telephone set which has a receiving circuit the power of which is turned on or off in predetermined cycles, a radio connector transmit an ID number of the radio zone where it exists for a longer period than the period of turning on or off the power supply of the receiving circuit of the radio telephone set in predetermined cycles, the radio telephone set compares the ID number of the radio zone received with that stored in a memory, and when the ID numbers fail to coincide with each other, the ID number of the radio telephone set and the ID number of the radio zone received are transmitted as a position entry signal to a radio channel control unit through the radio connector, and the radio channel control unit being adapted to register the ID number of the radio telephone set and that of the radio zone.