Patents by Inventor Steven Douglas Ishaug

Steven Douglas Ishaug 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: 5988289
    Abstract: A three wheeled sod laying apparatus is provided that employs a hydrostatic power system which allows the drive function and sod dispensing function to be operated at different speeds. This configuration enables the operator to vary the speed at which the sod is dispensed from the apparatus in relation to its forward speed to compensate for varying terrain or for inconsistences in the sod roll itself. The three wheeled configuration allows for a highly maneuverable vehicle that can straddle new sod as it is laid. Thus, the present invention allows for the laying of sod from large commercial sod rolls while avoiding the problems of sod buckling or tearing encountered while using presently available equipment.
    Type: Grant
    Filed: August 4, 1997
    Date of Patent: November 23, 1999
    Inventors: Gregory Paul Holland, Steven Douglas Ishaug