(under subclass 665) Waterbed or associated device with discrete means to inhibit or selectively control transfer of thermal energy between a waterbed and the user of a waterbed, or between the waterbed and the surrounding environment.
(1) Note. The insulating means generally comprise materials such as foam, fabric, air filled containers, or other generally poor conductors of thermal energy.
(2) Note. Devices whose sole function is to insulate must be present for patents in this subclass, not merely conventional frames, bedclothes, covers, or liners that inherently have insulating properties.
SEE OR SEARCH THIS CLASS, SUBCLASS:
700, for mattresses having insulating means.
938, for devices that include reflective materials.
SEE OR SEARCH CLASS 428, Stock Material or Miscellaneous Articles,
