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发明名称
Improvements in or relating to acoustic impedance devices
摘要
申请公布号
GB819146(A)
申请公布日期
1959.08.26
申请号
GB19560036031
申请日期
1956.11.26
申请人
STANDARD TELEPHONES AND CABLES LIMITED
发明人
ROBERTON JAMES SAMUEL PATERSON;WALKER KEITH WILLIAM ARTHUR
分类号
H04R1/22
主分类号
H04R1/22
代理机构
代理人
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