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发明名称
Memorandum device
摘要
申请公布号
US2189625(A)
申请公布日期
1940.02.06
申请号
US19380215951
申请日期
1938.06.27
申请人
LOUIS KARASIK
发明人
BURT HARRY M.
分类号
G09F23/00;H04M1/21
主分类号
G09F23/00
代理机构
代理人
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地址
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