Patents by Inventor Arie Adolf Demmers

Arie Adolf Demmers 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).

  • Spud guide means in a dredging vessel
    Patent number: 4033056
    Abstract: A dredging vessel has a vertically elongated spud guide in a well in the vessel, the guide being supported for horizontal movement in the well and for swinging movement in a vertical plane. Vertically spaced apart horizontal jacks are connected between the guide and the vessel.
    Type: Grant
    Filed: December 15, 1975
    Date of Patent: July 5, 1977
    Assignee: Bos Kalis Westminster Group N.V.
    Inventor: Arie Adolf Demmers