Sakari Ohira

System for detecting defective point on power transmission line by utilizing satellite

Radio communication apparatus and method for multiplex transmission of voice and data signals

Radio apparatus for simulataneously transmitting and receiving signals using a simple frequency

System for discriminating kinds of surges on power transmission lines

DTMF signal transmission method in single frequency simultaneous transmitting and receiving system and single frequency simultaneous transmitting and receiving system transceiver capable of transmitting DTMF signal

Transceiver controlled by absence/presence of input signal

Surge discriminating and locating system

Radio communication method and apparatus which adds an interrupt enable synchronizing signal to a compressed voice signal in place of a synchronizing A signal

Communication system interconnecting telephone line and single-frequency simultaneous transmission/reception radio system

Surge discriminating system