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发明名称
Mechanical calendar
摘要
申请公布号
US2215552(A)
申请公布日期
1940.09.24
申请号
US19380218002
申请日期
1938.07.07
申请人
WILLIAM G. GLEASON;ARCHIE D. MITCHELL
发明人
HOSTETLER ELDEN L.
分类号
G04B19/243
主分类号
G04B19/243
代理机构
代理人
主权项
地址
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