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经营范围
发明名称
Improvements in telephone or like systems
摘要
申请公布号
GB560794(A)
申请公布日期
1944.04.20
申请号
GB19420014466
申请日期
1942.10.15
申请人
AUTOMATIC TELEPHONE & ELECTRIC COMPANY LIMITED;CHARLES GILLINGS;CHARLES EDMUND BEALE;TESEO BRUNO DANTE TERRONI
发明人
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
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