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发明名称
Calendar clock
摘要
申请公布号
US3400510(A)
申请公布日期
1968.09.10
申请号
US19660541805
申请日期
1966.04.11
申请人
HENRY SCHWARZER;ESTHER SCHWARZER
发明人
SCHWARZER HENRY;SCHWARZER ESTHER
分类号
G04B19/253
主分类号
G04B19/253
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