Patents by Inventor Robert Evanson

Robert Evanson 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: 4328598
    Abstract: A mattress foundation having a rigid frame covered at least in part by a continuous stationary horizontal top surface. A layer of resilient material overlies the stationary top surface. An open grid freely rests on this layer and is resiliently supported by it. A powered vibrator unit is fixed to the grid and is physically clear of contact with the frame. The grid is resiliently covered. It is capable of imparting vibratory movement about the top surface of the completed foundation assembly. In one form, a section of the grid is resiliently supported on the frame by interposed upright springs.
    Type: Grant
    Filed: May 27, 1980
    Date of Patent: May 11, 1982
    Assignee: Northwest Bedding Co.
    Inventor: Robert Evanson
  • Patent number: 4245361
    Abstract: A water bed mattress having a sealed liquid enclosure containing a relatively stiff peripheral cushion of foam plus a resilient open-cell filling within a central cavity.
    Type: Grant
    Filed: October 26, 1979
    Date of Patent: January 20, 1981
    Inventor: Robert Evanson