Patents by Inventor Leo Koet

Leo Koet 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).

  • Wheelchair
    Patent number: 5217239
    Abstract: In providing wheelchairs with a central suspension, which comprises a funicular quadrangle and parallelogram hinges, less effort is needed to adjust the position of the chair with respect to the chassis and, moreover, the danger of tumbling is considerably reduced.
    Type: Grant
    Filed: December 30, 1991
    Date of Patent: June 8, 1993
    Assignee: Linido B.V.
    Inventor: Leo Koet
  • Variable height bathtub
    Patent number: D267033
    Type: Grant
    Filed: September 2, 1980
    Date of Patent: November 23, 1982
    Inventor: Leo Koet