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Class Information
Number: 297/452.29
Name: Chairs and seats > Bottom or back > Contoured back
Description: Device including a back configured to substantially conform with the shape or curvature of a back of a seated occupant.










Sub-classes under this class:

Class Number Class Name Patents
297/452.3 For lower back; i.e., lumbar region 39
297/452.37 Having varying density foam 27
297/452.33 Laterally extending contour 44


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8602501 Backrest Dec. 10, 2013
8574705 Laminates and method of manufacturing laminates with layers of non-uniform thickness Nov. 5, 2013
8523285 Vehicle seat Sep. 3, 2013
8398170 Active response seating system Mar. 19, 2013
8162402 Vehicular seats Apr. 24, 2012
8104840 Attachable and detachable type seat pad and method of fabricating the same, and seat using attachable and detachable type seat pad Jan. 31, 2012
7909402 Back support for a seat Mar. 22, 2011
7878598 Base plate for a chair Feb. 1, 2011
7748783 Backrest for chair Jul. 6, 2010
7604299 Backrest assembly Oct. 20, 2009
7600821 Seat Oct. 13, 2009
7320503 Backrest for seats and chairs having pressure and tensile elements Jan. 22, 2008
7270377 Lumbar support for law enforcement officers Sep. 18, 2007
7252340 Aircraft passenger seat with forward arm rest pivot Aug. 7, 2007
6926358 Impact absorbing structure and seat structure Aug. 9, 2005
6910741 Lumbar support Jun. 28, 2005
6899397 Aircraft passenger seat with forward arm rest pivot May. 31, 2005
6655740 Motorcycle backrest Dec. 2, 2003
6652034 Upholstery support Nov. 25, 2003
6454352 Car seat pad Sep. 24, 2002
6409268 Flexible chair back Jun. 25, 2002
6394547 Ergonomic chair May. 28, 2002
6231124 Multi-functional cafe chair May. 15, 2001
6217121 Therapeutic cushioning device Apr. 17, 2001
6139110 Reinforced cantilever bench Oct. 31, 2000
6099075 Seating arrangement Aug. 8, 2000
6041457 Method of stretching the human back Mar. 28, 2000
6003937 Safety seat Dec. 21, 1999
5779317 Chair with interchangeable chair components Jul. 14, 1998
5722102 Backrest device Mar. 3, 1998
5580124 Apparatus for preventing whiplash Dec. 3, 1996
5547253 Sit/stand adjustable, tower chair Aug. 20, 1996
5425567 Backrests/legless leisure chairs and methods for making cushions Jun. 20, 1995
5328245 Chair having adjustable back support Jul. 12, 1994
5314240 Shell structure for use with a chair having synchronously moving seat and seat back May. 24, 1994
5286083 Lumbar support back rest Feb. 15, 1994
5251963 Vehicular long cruising seat Oct. 12, 1993
5163737 Cushion Nov. 17, 1992
5108151 Upholstery support for the back rest of a motor vehicle Apr. 28, 1992
5085487 Seat with foamed plastic padding and process for its manufacture Feb. 4, 1992
5052755 Chair, and methods of constructing and utilizing same Oct. 1, 1991
5018791 Seating furniture May. 28, 1991
4981326 Ergonomic chair Jan. 1, 1991
4969688 Vehicular seat Nov. 13, 1990
4835029 Sheath structure for furniture, envelopes, paneling, and the like May. 30, 1989
4796954 Seat back rear structure Jan. 10, 1989
4779930 Infant head support for use with infant retaining devices Oct. 25, 1988
4621866 Armchair structure having an adjustable anatomical configuration Nov. 11, 1986
4615561 Vehicle seat Oct. 7, 1986
4607882 Chair with saddle shaped seat and members externally transversely therefrom Aug. 26, 1986

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