(under subclass 731) Nonplanar mattress top surface in which the pad accommodates a user's lower torso or extremities, often in a raised or lowered configuration relative to other body portions of the user.
SEE OR SEARCH THIS CLASS, SUBCLASS:
624, for invalid beds or surgical supports with lower body portion supporting or restraining means.
648+, for lower body supporting devices that are removably positionable on the top surface of a mattress or other body support.
