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发明名称
Telephone system
摘要
申请公布号
US3330912(A)
申请公布日期
1967.07.11
申请号
US19640335554
申请日期
1964.01.03
申请人
NIPPON ELECTRIC COMPANY LIMITED
发明人
KOSEKI HIKORO
分类号
H04M9/08;H04M9/10
主分类号
H04M9/08
代理机构
代理人
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地址
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