4. Binder device releasably engaging aperture or notch of sheet
  5. Sheet retainer travels arcuate path
  6. Travel in plane perpendicular to axis of rotation

World Wide Stationery Mfg. Co. Ltd.

Corporate Assignee

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Assembling and disassembling device for ring binders

Binder device releasably engaging aperture or notch of sheet – Sheet retainer travels arcuate path
Patent

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Hangable ring mechanism

Binder device releasably engaging aperture or notch of sheet – Resilient sheet retainer requiring deflection for sheet removal
Reexamination Certificate

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Lever for a ring binder mechanism

Binder device releasably engaging aperture or notch of sheet – Resilient sheet retainer requiring deflection for sheet removal – Opposed sheet retainers
Reexamination Certificate

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Partially corrugated ring binder housing

Office supplies; artists and teachers materials – Book – album or cover – Element or attachment
Design Patent

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Positive lock ring binder mechanism

Binder device releasably engaging aperture or notch of sheet – Depository
Reexamination Certificate

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