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发明名称
Turnstile
摘要
申请公布号
US1920958(A)
申请公布日期
1933.08.08
申请号
US19300424969
申请日期
1930.01.31
申请人
CHAPMAN FRANK L
发明人
CHAPMAN FRANK L.
分类号
G07F17/14
主分类号
G07F17/14
代理机构
代理人
主权项
地址
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