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发明名称
Program service system
摘要
申请公布号
US1873813(A)
申请公布日期
1932.08.23
申请号
US19300495888
申请日期
1930.11.15
申请人
THE STROMBERGCARLSON TELEPHONE MANUFACTURING COMPANY
发明人
BERGMANN CHARLES H.
分类号
H04H20/83
主分类号
H04H20/83
代理机构
代理人
主权项
地址
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