4. Office supplies; artists and teachers materials
  5. Book, album or cover
  6. Element or attachment

Simon Chun Yuen To

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Ring binder

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

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Ring binder

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

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Ring binder

Binder device releasably engaging aperture or notch of sheet – Sheet retainer travels arcuate path – Travel in plane perpendicular to axis of rotation
Patent

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Profile ID: LFUS-PAI-P-895490

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