Portable telephone performing a predetermined operation...
Portable telephone set and communication base station...
Portable telephone set and communication inquiring method...
Portable telephone set and communicative base station...
Portable telephone set and control method thereof
Portable telephone set and control method thereof
Portable telephone set for detecting radio wave interference...
Portable telephone set with automatic sound generation when it i
Portable telephone set with interference detecting and...
Portable telephone set, conversation simulation method, and...
Portable telephone system
Portable telephone system
Portable telephone system and communication control method...
Portable telephone system and communication control method...
Portable telephone system and control method therefor
Portable telephone system and method of performing communication
Portable telephone system capable of simultaneously carrying...
Portable telephone system containing portable telephone...
Portable telephone system with telephone answering device
Portable telephone terminal apparatus for receiving data and...