Hierarchical call control with selective broadcast audio messaging system | Patent Publication Number 20020068552

US 20020068552 A1

Patent NumberUS 06970706 B2

Application Number9731330

Filled DateDec 5, 2000

Priority DateDec 5, 2000

Publication DateJun 6, 2002

Original AssigneeSiemens Ag

Current AssigneeValyrian Ip Llc

Inventor/ApplicantsGerhard Siemens
Gerhard Siemens

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