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发明名称
Telephone signalling systems utilizing tunnel diodes
摘要
申请公布号
US3294923(A)
申请公布日期
1966.12.27
申请号
US19620201856
申请日期
1962.06.12
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
VOGEL GEORG
分类号
H04M1/515;H04Q1/38
主分类号
H04M1/515
代理机构
代理人
主权项
地址
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