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Exercise bed
Adjustable beds are commonly used in hospitals to help patients change position and get up with minimal help. Now Charles Filipi, a surgeon at Creighton University in Omaha, Neb., wants to take them a step further, literally.
He says that many obese patients are required to exercise as part of their treatment. But getting them into a standing position can involve numerous staff and finding a treadmill for them to work out on can be even more time consuming.
So, Filipi suggests building the treadmill into the hospital bed. When not in use, the treadmill sits in a vertical position at the end of the bed. 
http://www.wipo.int/pctdb/en/wo.jsp?WO=2008052220 (http://www.wipo.int/pctdb/en/wo.jsp?WO=2008052220)