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21.Mechanism for reversing motive devices for operating doors and the like 失效
Title translation: 用于翻转操作门等的动力装置的机构公开(公告)号:US1877161A
公开(公告)日:1932-09-13
申请号:US45526430
申请日:1930-05-24
Applicant: NAT PNEUMATIC CO
Inventor: CONKLIN ROSCOE D
IPC: E05F15/00
CPC classification number: E05F15/41 , E05Y2900/132 , E05Y2900/40
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公开(公告)号:US1874454A
公开(公告)日:1932-08-30
申请号:US52874231
申请日:1931-04-09
Applicant: NAT PNEUMATIC CO
Inventor: CONKLIN ROSCOE D
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公开(公告)号:US1843971A
公开(公告)日:1932-02-09
申请号:US49580130
申请日:1930-11-14
Applicant: NAT PNEUMATIC CO
Inventor: CONKLIN ROSCOE D
IPC: F16K31/10
CPC classification number: F16K31/10
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公开(公告)号:US1835014A
公开(公告)日:1931-12-08
申请号:US35296529
申请日:1929-04-06
Applicant: NAT PNEUMATIC CO
Inventor: CONKLIN ROSCOE D
IPC: H01H3/16
CPC classification number: H01H3/16
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公开(公告)号:US1694583A
公开(公告)日:1928-12-11
申请号:US75758224
申请日:1924-12-23
Applicant: NAT PNEUMATIC CO
Inventor: CONKLIN ROSCOE D
IPC: F04B41/04
CPC classification number: F04B41/04
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