4. Movable or removable closures
  5. Up-and-over type; e.g., moves from vertical to withdrawn...
  6. With operator

Donald S. Harris

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Door lock

Closure fasteners – Operators with knobs or handles
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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Drawbar arm for door operator

Movable or removable closures – Up-and-over type; e.g. – moves from vertical to withdrawn... – With operator
Patent

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Profile ID: LFUS-PAI-P-207413

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