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发明名称
SOUND RECORDING FOR MOTION PICTURE FILMS
摘要
申请公布号
US3508817(A)
申请公布日期
1970.04.28
申请号
USD3508817
申请日期
1966.09.08
申请人
NATIONAL RESEARCH CORP.
发明人
MILO P. HNILICKA JR.
分类号
G03B31/02;G11B7/003;(IPC1-7):G03B31/02
主分类号
G03B31/02
代理机构
代理人
主权项
地址
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