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公开(公告)号:US1064847A
公开(公告)日:1913-06-17
申请号:US1912707495
申请日:1912-07-03
Applicant: WESTERN DOOR CONTROL COMPANY
Inventor: MILLS EDWARD N
CPC classification number: B66B13/08
公开(公告)号:US1064847A
公开(公告)日:1913-06-17
申请号:US1912707495
申请日:1912-07-03
Applicant: WESTERN DOOR CONTROL COMPANY
Inventor: MILLS EDWARD N
CPC classification number: B66B13/08