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摘要
申请公布号
US2275664(A)
申请公布日期
1942.03.10
申请号
US19390306320
申请日期
1939.11.27
申请人
WHITNEY BYRI A
发明人
WHITNEY BYRI A.
分类号
G11B33/04
主分类号
G11B33/04
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代理人
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