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发明名称
Improvements in and relating to date indicators
摘要
申请公布号
GB430109(A)
申请公布日期
1935.06.13
申请号
GB19340006225
申请日期
1934.02.26
申请人
ARTHUR CHARLES;ERNEST WILLIAM SMITH;SMITH METERS LIMITED
发明人
分类号
G04B19/253
主分类号
G04B19/253
代理机构
代理人
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地址
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