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经营范围
发明名称
Automatic secretarial reminder
摘要
申请公布号
US2533751(A)
申请公布日期
1950.12.12
申请号
US19490108715
申请日期
1949.08.05
申请人
ALBERS JOSEPH A
发明人
ALBERS JOSEPH A.
分类号
G04B25/00;G09F23/16
主分类号
G04B25/00
代理机构
代理人
主权项
地址
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TASTO NON GIREVOLE DI FORMA CIRCOLARE PER PULSANTIERA A MURO.
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