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发明名称
IMPROVEMENTS IN OR RELATING TO ELECTROACOUSTICAL TELEPHONE ADAPTERS
摘要
申请公布号
SG45782(G)
申请公布日期
1983.07.08
申请号
SG19820000457
申请日期
1982.09.17
申请人
ABRAM NATHANIEL SPANEL
发明人
分类号
H04M1/21;H04M1/215;H04M1/60;(IPC1-7):H04B3/24
主分类号
H04M1/21
代理机构
代理人
主权项
地址
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