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发明名称
Apparatus for determining the loudness rating of a telephone system
摘要
申请公布号
GB2121549(A)
申请公布日期
1983.12.21
申请号
GB19820015938
申请日期
1982.06.01
申请人
* STANDARD TELEPHONES AND CABLES PUBLIC LIMITED COMPANY
发明人
GEORGE JOHN PRESTON * BARNES;MICHAEL STANLEY * HURLEY;DAVID EBENEZER JAMES * DAWSON;* JIAN QIANG HE
分类号
H04M3/30;(IPC1-7):G01R31/00
主分类号
H04M3/30
代理机构
代理人
主权项
地址
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