Patents by Inventor Johannes C. Kaars Sijpesteijn

Johannes C. Kaars Sijpesteijn 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).

  • Mat
    Patent number: 5215802
    Abstract: The invention relates to a mat comprising a plurality of elongated rails arranged parallel to one another and each having a receiving portion adapted to receive a tread member. The rails are coupled by way of first and second connecting elements, preferably consisting of T-shaped members and U-shaped members, by insertion in a direction perpendicular to the longitudinal axis of the rails.
    Type: Grant
    Filed: April 6, 1992
    Date of Patent: June 1, 1993
    Assignee: Koninklijke Tufton B.V.
    Inventor: Johannes C. Kaars Sijpesteijn