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发明名称
Sound producing device
摘要
申请公布号
US2497457(A)
申请公布日期
1950.02.14
申请号
US19460641122
申请日期
1946.01.14
申请人
KUCERA RUDOLPH C
发明人
KUCERA RUDOLPH C.
分类号
A63H5/04
主分类号
A63H5/04
代理机构
代理人
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地址
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