Inventor

INOKUMA YOSHIKATSU

JP2 patents

Patents

2 patents

US4969182ANov 6, 1990

Method of telephone call wherein status data inhibits calls and indicates to the caller the reason the called subscriber is unavailable

HITACHI LTD25 citations86

US5652576AJul 29, 1997

Switching system and information storing equipment

HITACHI LTD8 citations69