Chair backrest device

Details Chair backrest device Chair backrest device

A - Human Necessities

47

C

A47C 7/40 (2006.01) A47C 3/026 (2006.01) A47C 7/44 (2006.01)

Patent

CA 2756711

A chair backrest device comprising a backrest frame and a backrest shell supported by the backrest frame, the backrest shell comprising a back frame and a flexible back support within the back frame, the back support being the thickest in middle of a width direction and gradually getting thinner horizontally from the middle toward each side.

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