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公开(公告)号：US1459949A
公开(公告)日：1923-06-26
申请号：US41513520
申请日：1920-10-06
Applicant: DOOR CONTROL COMPANY
Inventor： DORL WALTER P
CPC classification number: E05C17/203 , E05C17/36 , Y10T16/568 , Y10T16/61
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公开(公告)号：US1504748A
公开(公告)日：1924-08-12
申请号：US43918621
申请日：1921-01-22
Applicant: DOOR CONTROL COMPANY
Inventor： DORL WALTER P
IPC: E05F1/10
CPC classification number: E05F1/105 , E05Y2900/132 , Y10T16/568 , Y10T16/61 , Y10T292/28
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