Inventor
KUMON MASAHIRO
JP4 patents
Patents
4 patentsUS4969182ANov 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
US5563940AOct 8, 1996
System for connecting an incoming call to a selected one of a number of extensions
HITACHI LTD14 citations78
US5541992AJul 30, 1996
System for connecting an incoming call to a selected one of a number of extensions
HITACHI LTD11 citations70
US5815564ASep 29, 1998
System for connecting an incoming call to a selected one of a number of extensions
HITACHI LTD1 citations59