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发明名称
Pocket parliamentary law indicator
摘要
申请公布号
US2498854(A)
申请公布日期
1950.02.28
申请号
US19460665854
申请日期
1946.04.29
申请人
HAZEL EDWIN M
发明人
HAZEL EDWIN M.
分类号
G09B29/02
主分类号
G09B29/02
代理机构
代理人
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