Patents by Inventor Robert M. Williamson

Robert M. Williamson 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).

  • Adjustable bed system
    Patent number: 4873731
    Abstract: An adjustable bed system comprising inflatable bags under a hinged mattress support frame with necessary air blowers to raise or lower a head end and leg end of the mattress. The total unit being portable and adapted to fit any size bed.
    Type: Grant
    Filed: February 1, 1989
    Date of Patent: October 17, 1989
    Inventor: Robert M. Williamson
  • Adjustable bed system
    Patent number: 4839932
    Abstract: An adjustable bed system comprising inflatable bags under a hinged mattress support frame with necessary air blowers to raise or lower a head end or leg end of the mattress. The total unit is portable and adapted to fit any size bed.
    Type: Grant
    Filed: May 26, 1987
    Date of Patent: June 20, 1989
    Inventor: Robert M. Williamson