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发明名称
Telephone alert system
摘要
申请公布号
US2841650(A)
申请公布日期
1958.07.01
申请号
US19560623349
申请日期
1956.11.20
申请人
KOILED KORDS, INCORPORATED
发明人
KOEHLER ROBERT L.
分类号
H04M11/04
主分类号
H04M11/04
代理机构
代理人
主权项
地址
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