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经营范围
发明名称
SOUND SIGNAL CONVERTER
摘要
申请公布号
JPS5723356(A)
申请公布日期
1982.02.06
申请号
JP19800089204
申请日期
1980.07.02
申请人
HITACHI LTD
发明人
KATOU TAKAO;TAKEMURA TETSUO;HORIKI AKIRA;WATANABE NOBORU
分类号
H04M11/06;H04B3/20;H04B14/04;H04J3/12;H04J99/00;H04L12/64;H04Q11/04
主分类号
H04M11/06
代理机构
代理人
主权项
地址
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