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发明名称
ACOUSTIC COUPLER DEVICE
摘要
申请公布号
JPH04311144(A)
申请公布日期
1992.11.02
申请号
JP19910103397
申请日期
1991.04.09
申请人
RICOH CO LTD
发明人
KAGAWA TETSUYA
分类号
H04M11/00;H04N1/00
主分类号
H04M11/00
代理机构
代理人
主权项
地址
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