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发明名称
SOUND PROPAGATING APPARATUS
摘要
申请公布号
US3586120(A)
申请公布日期
1971.06.22
申请号
USD3586120
申请日期
1968.07.16
申请人
ZENITH RADIO CORP.
发明人
ROBERT ADLER
分类号
G02F1/33;(IPC1-7):G10K11/00
主分类号
G02F1/33
代理机构
代理人
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地址
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