(under subclass 636) Subject matter wherein the head or neck supporting means has resilient means usually located beneath the supporting surface.
(1) Note. The spring means includes coil springs, torsion bars, leaf springs or any deformable materials such as wires or bars that tend to return to an undeformed condition.
SEE OR SEARCH THIS CLASS, SUBCLASS:
491, for pillow shams that often include springs.
716+, for mattress or cushion which has a spring core.
SEE OR SEARCH CLASS
267, Spring Devices, for appropriate subclasses for spring devices of general utility.
