The invention provides a bed which, when an individual lies down upon it, allows him to take the "Yoga Slant Position" -- with the head lower than the feet -- through its automatic tilting operation, which gently returns the bed to its normal horizontal position after a short time. The bed is supported...http://www.google.es/patents/US3993051?utm_source=gb-gplus-sharePatente US3993051 - Bed
