4. Chairs and seats
  5. Back movement resiliently opposed in operating position
  6. Constantly oriented during up-and-down movement

Mark E. Kuyper

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Chair height and tilt adjustment mechanisms

Chairs and seats – Back movement resiliently opposed in operating position – Constantly oriented during up-and-down movement
Patent

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Heater assembly and mounting arrangement for a dryer

Drying and gas or vapor contact with solids – Apparatus – Rotary drums or receptacles
Patent

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Height adjustment control for a chair

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

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Tilt adjustment control for a chair

Chairs and seats – Back movement resiliently opposed in operating position – Constantly oriented during up-and-down movement
Patent

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