(under subclass 665) Waterbeds or associated devices disclosing the use of devices within the bladder which have the function of controlling the movement of liquid, or waves within the bladder that are formed when a user gets on or off, or moves on the top surface of the bladder.
(1) Note. This subclass must have structural elements that are located inside the water filled bladder and may or may not be connected to the bladder's inner walls.
(2) Note. The baffles in this subclass generally comprise strips or sheets of plastic materials, chunks, or layers of polymeric foams, all located within the bladder.
