4. Chairs and seats
  5. Movable bottom
  6. Bottom and back movable as a unit

Tung Yu Oa Co. Ltd.

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Backrest adjustment device

Chairs and seats – Back movement resiliently opposed in operating position – Back adjusts independent of seat
Reexamination Certificate

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Base manipulation device for office chair

Chairs and seats – Movable bottom – Bottom and back movable as a unit
Reexamination Certificate

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Reclining apparatus for chair

Chairs and seats – Back movement resiliently opposed in operating position – Back adjusts independent of seat
Reexamination Certificate

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