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发明名称
Sundial
摘要
申请公布号
US1811183(A)
申请公布日期
1931.06.23
申请号
US19300483173
申请日期
1930.09.20
申请人
HERMAN NEUWIRTH
发明人
NEUWIRTH HERMAN
分类号
G04B49/02
主分类号
G04B49/02
代理机构
代理人
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