申请人 |
BRITISH TELECOMMUNICATIONS PUBLIC LIMITED;STC PLC;FERRANTI CREDITPHONE LIMITED;GEC PLESSEY TELECOMMUNICATIONS LIMITED;MERCURY COMMUNICATIONS LIMITED;ORBITEL MOBILE COMMUNICATIONS LIMITED;SHAYE COMMUNICATIONS LIMITED;PHONEPOINT LIMITED |
发明人 |
MICHAEL T. DUDEK;R. GOODINGS;EMLYN JONES;DAVID CRAWFORD ODHAMS;PETER NICHOLAS PROCTOR |