Adjustable backrest for a chair
Adjustable chair
Adjustable swivel chair
Adjusting mechanism for an adjustable chair
Adjustment device of a chair backrest
Apparatus for adjusting inclination of chair backs
Articulated reclining backrest with lumbar support
Auditorium seating system
Back construction with flexible lumbar
Back for seating unit
Backrest adjustment device
Backrest for a seat arrangement
Base structure for chair seat
Chair
Chair
Chair
Chair
Chair
Chair
Chair and support mechanism unit thereof