Patents by Inventor Mituyoshi Hamasu

Mituyoshi Hamasu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4047254
    Abstract: A mattress construction comprises an intermediate layer of a semi rigid wave shaped resin material and with a top layer overlying the intermediate layer made of a resilient foamed resin material and a lower layer made of a resilient foamed resin material having a greater elastic restoring force than the upper layer. The greater elastic foamed restoring force may be accomplished by the increased density of the material being employed or by making the material of distinct substances giving the desired elastic characteristics. In one embodiment an electrified body in the form of a blanket is interposed between the intermediate layer and the top or upper layer.
    Type: Grant
    Filed: April 8, 1976
    Date of Patent: September 13, 1977
    Inventor: Mituyoshi Hamasu