Osamu Yamashita

Portable radio terminal having a removable radio system unit

Device and method for automatically controlling sound volume in a communication apparatus

Portable alerting unit for alerting a user to call arrival to portable radio apparatus

Cellular network acquisition method and apparatus

Hermetically sealed electrostrictive actuator

Mobile radio communication apparatus

Apparatus and method for mobile communications

Portable radio device with on-vehicle adaptor system

Voltage controlled oscillator circuit capable of switching between oscillation frequency bands

Output power control device