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发明名称
FREQUENCY CHARACTERISTICS IMPROVING APPARATUS OF ELECTRIC ACOUSTIC CONVERTER PROVIDED IN TELEPHONE HAND SET MAIN BODY
摘要
申请公布号
JPS63138839(A)
申请公布日期
1988.06.10
申请号
JP19870289669
申请日期
1987.11.18
申请人
SIEMENS AG
发明人
ERUNSUTO PAIYAA
分类号
H04R1/28;H04M1/00;H04R1/22;H04R17/00
主分类号
H04R1/28
代理机构
代理人
主权项
地址
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