US PATENT SUBCLASS 5 / 935
WITH ADJUSTABLE FIRMNESS
Current as of: June, 1999
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DEFINITION
Classification: 5/935
WITH ADJUSTABLE FIRMNESS:
(under the class definition) A collection of documents disclosing the use of body supports, with at least a portion of the user supporting surface of the body support having a variable or adjustable support characteristic, firmness or hardness, with the support characteristic, firmness or hardness changeable from one fixed value to another fixed value.
(1) Note. Fluent material fillable supports, such as air
inflatible mattresses, which are inherently adapted to have their firmness varied, by inflation or deflation, are excluded from this collection.
(2) Note. Supports with removable or replaceable stiffening means such as stiffening boards or rods are excluded from this subclass.
