IMPROVEMENTS IN OR RELATING TO AUDIO TELECONFERENCING
摘要
申请公布号
EP0004182(A3)
申请公布日期
1979.10.03
申请号
EP19790300342
申请日期
1979.03.07
申请人
THE POST OFFICE
发明人
GROVES, IAN STANLEY;GUARD, DAVID ROBERT;BUNTING, JOHN GRAHAM;ROWLANDS, CHRISTOPHER EDMUND;POWTER, EDWIN JOHN;HOLMES, DAVID WILLIAM JAMES;TROTT, GRAHAM JOHN
