.~ Supported on or removably attachable to another mattress
DEFINITION
Classification: 5/691
Supported on or removably attachable to another mattress:
(under subclass 690) Mattress especially adapted to be removably placed on top of another mattress, beneath a user.
(1) Note. The mattresses under this subclass are of substantially the same length and width as the mattress on top of which they are supported, are usually thinner than the mattress they are supported on, but are substantially thicker than a quilted sheet, and often include separable fasteners, such as straps or belts that help their removable retention on the supporting mattress.
SEE OR SEARCH THIS CLASS, SUBCLASS:
500, for a multilayered sheet adapted to contact a mattress.
736, for mattresses with egg crate peaks and valleys on their top surfaces, that are often used removably on top of a supporting mattress.
