A chair is provided with an adjustable back support which quickly and easily conforms to the contours of the user's back. The chair has a seat and an upwardly extending support bar. A number of segments are received on the support bar to define a support surface for supporting the back of the user. The...http://www.google.com/patents/US5328245?utm_source=gb-gplus-sharePatent US5328245 - Chair having adjustable back support
