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发明名称
Automatic door operator having automatic means for manual operation
摘要
申请公布号
US2646981(A)
申请公布日期
1953.07.28
申请号
US19470792258
申请日期
1947.12.17
申请人
NATIONAL PNEUMATIC CO., INC.
发明人
BASSETT CYRUS W.;VEER JOHN H. VANDER;WEIGELE ALBERT E.
分类号
E05F15/02
主分类号
E05F15/02
代理机构
代理人
主权项
地址
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