Improvements in or relating to electric signalling systems
摘要
申请公布号
GB576948(A)
申请公布日期
1946.04.29
申请号
GB19440003989
申请日期
1944.03.03
申请人
STANDARD TELEPHONES AND CABLES LIMITED;ERIC MALCOLM SWIFT MCWHIRTER;ROLAND HARRIS DUNN;CYRIL HERBERT CHAMBERS;FREDERICK WILLIAM WARDEN;STUART SEYMOUR HILL
