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经营范围
发明名称
Improvements in or relating to telephone transmitters
摘要
申请公布号
GB348716(A)
申请公布日期
1931.05.21
申请号
GB19300005809
申请日期
1930.02.21
申请人
STANDARD TELEPHONES AND CABLES, LIMITED;LYNDALL CROSSTHWAITE POCOCK;CHRISTOPHER BERNARD VERE NEILSON;REGINALD BLACKBURN
发明人
分类号
H04R21/02
主分类号
H04R21/02
代理机构
代理人
主权项
地址
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