Quarterline stop control system for power driven revolving doors

Invention Grant

US3497997A Quarterline stop control system for power driven revolving doors 失效

Title translation: 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
Application No.: US3497997D

Application Date: 1968-06-14
Publication No.: US3497997A

Publication 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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