Invention Grant
US3497997A Quarterline stop control system for power driven revolving doors
失效
用于动力驱动门的QUARTERLINE停止控制系统
- Patent Title: Quarterline stop control system for power driven revolving doors
- Patent Title (中): 用于动力驱动门的QUARTERLINE停止控制系统
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Application No.: US3497997DApplication Date: 1968-06-14
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Publication No.: US3497997APublication Date: 1970-03-03
- Inventor: SHECKELLS AMUEL E
- Applicant: INT STEEL CO
- Assignee: Int Steel Co
- Current Assignee: Int Steel Co
- Priority: US73720768 1968-06-14
- Main IPC: E05F15/10
- IPC: E05F15/10 ; E05D15/02 ; E05F15/12
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