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Door closing device with a belt-shaped spiral spring

Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Closers – Spring
Patent

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Door closing mechanism

Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Closers – Spring
Reexamination Certificate

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Door operating mechanism

Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Closers – Spring and lever
Patent

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Door operator and process for operation of a door operator

Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Closers – Spring and gear
Reexamination Certificate

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Door retaining device

Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Closers – Spring and flexible link
Reexamination Certificate

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Door return apparatus

Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Closers – Spring
Patent

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Door security track

Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Closers – Spring and lever
Patent

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Drive system for a door or window and method of operating same

Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Closers – Spring and gear
Reexamination Certificate

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