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Detection of obstruction of doors

Movable or removable closures – Safety means responsive to obstruction to closure
Reexamination Certificate

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Device for automatically controlling opening and closing of...

Movable or removable closures – Safety means responsive to obstruction to closure
Reexamination Certificate

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Device for operating a pocket door

Movable or removable closures – Safety means responsive to obstruction to closure
Patent

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Door arrangement for the control panel of an apparatus

Movable or removable closures – Safety means responsive to obstruction to closure – Sensing shoe on leading edge
Patent

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Door operator with instant reverse feature

Movable or removable closures – Safety means responsive to obstruction to closure – Closure drive stopping or reversal
Patent

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Door operator with instant reverse feature

Movable or removable closures – Safety means responsive to obstruction to closure – Closure drive stopping or reversal
Patent

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Door operator with screw drive

Movable or removable closures – Safety means responsive to obstruction to closure – Closure drive stopping or reversal
Patent

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Drive for a vehicle door

Movable or removable closures – Safety means responsive to obstruction to closure – Closure drive stopping or reversal
Patent

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Dual safety-edge for an overhead door

Movable or removable closures – Safety means responsive to obstruction to closure – Sensing shoe on leading edge
Reexamination Certificate

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