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:
Apr. 04, 1988
Katsuo Suzuki, Tokyo, JP;
Kazuyuki Umebayashi, Tokyo, JP;
Abstract
A telephone apparatus has a telephone set including a wireless handset, a wireless transmitter, a wireless receiver, a signal identifying circuit for discriminating received signals to generate or erase power-on signals, a telephone set power supply circuit having a secondary battery cluster and switch circuits for applying the voltage of the secondary battery cluster to the above-described elements during a predetermined period, a power supply terminal connected to the secondary battery cluster, and a telephone set power supply controlling circuit; a main power supply; a power supply switch; a connection switching circuit for selectively connecting the power supply terminal to the power supply switch or a predetermined load; and a telephone power supply control instructing circuit responsive to the closing of the power supply switch for operating the connection switching circuit to form a connection between the power supply terminal and the predetermined load to transmit a first signal, subsequently operating the connection switching circuit to form a connection between the power supply terminal and the power supply switch to transmit a second signal in response to the opening of the power supply switch.