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发明名称
Listener preference registering and recording
摘要
申请公布号
US2709636(A)
申请公布日期
1955.05.31
申请号
US19480019064
申请日期
1948.04.05
申请人
OWENS FREEMAN H
发明人
OWENS FREEMAN H.
分类号
H04H60/32;H04H60/33;H04H60/44;H04H60/45
主分类号
H04H60/32
代理机构
代理人
主权项
地址
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