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发明名称
Improvements in or relating to telephone instruments
摘要
申请公布号
GB785950(A)
申请公布日期
1957.11.06
申请号
GB19550020801
申请日期
1955.07.19
申请人
AUTOMATIC TELEPHONE & ELECTRIC COMPANY LIMITED
发明人
DERBYSHIRE ROBERT ANTHONY;BAILEY REGINALD
分类号
H04M1/03
主分类号
H04M1/03
代理机构
代理人
主权项
地址
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