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发明名称
Electric door operator
摘要
申请公布号
US1863417(A)
申请公布日期
1932.06.14
申请号
US19270216808
申请日期
1927.09.01
申请人
ELEVATOR SUPPLIES COMPANY, INC.
发明人
SHONNARD HAROLD W.
分类号
B66B13/08
主分类号
B66B13/08
代理机构
代理人
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