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发明名称
ECHO SUPPRESSING DEVICE FOR LOUDSPEAKER TELEPHONE SET
摘要
申请公布号
JPH0360559(A)
申请公布日期
1991.03.15
申请号
JP19890197746
申请日期
1989.07.28
申请人
MATSUSHITA ELECTRIC IND CO LTD
发明人
FURUKAWA HIROMOTO;KANAMORI TAKEO;IBARAKI SATORU
分类号
H04M1/60;H04B3/20
主分类号
H04M1/60
代理机构
代理人
主权项
地址
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