4. Chairs and seats
  5. Back movement resiliently opposed in operating position
  6. Back and seat adjust simultaneously

James A. Perkins

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Back for seating unit

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

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Back for seating unit

Chairs and seats – Bottom or back with means to alter contour – Providing support for lower back region
Reexamination Certificate

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Cable integrity by acoustic emission

Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent

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Chair including novel back construction

Chairs and seats – Back movement resiliently opposed in operating position – Back and seat adjust simultaneously
Patent

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Lumbar device

Chairs and seats – Bottom or back with means to alter contour – Providing support for lower back region
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1857805

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