4. Supports
  5. Stand
  6. Understructure

Robert A. Nagelkirk

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Chair base

Supports – Stand – Understructure
Patent

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Chair base

Supports – Stand – Understructure
Patent

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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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Height adjustment control for a chair

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

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Structural support system with load control

Supports: cabinet structure – With internal guides or trackways
Patent

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Profile ID: LFUS-PAI-P-318313

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