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发明名称
AUDIENCE CONTROL BARRIER
摘要
申请公布号
HK46684(A)
申请公布日期
1984.06.08
申请号
HK19840000466
申请日期
1984.05.31
申请人
SICO INCORPORATED
发明人
RONALD R CARLSON;KERMIT H WILSON
分类号
E04H17/00;A63J1/00;E01F13/02;E04H17/18;(IPC1-7):E04H17/18
主分类号
E04H17/00
代理机构
代理人
主权项
地址
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