Patents by Inventor Rudolf J. A. M. van Rooijen

Rudolf J. A. M. van Rooijen 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).

  • Basket-shaped dual function hoe-rake
    Patent number: 4286673
    Abstract: A hoe-rake including a flat, wide-meshed basket-shaped structure attached to a shaft. The basket-shaped structure includes radially placed strips or wires in two horizontal planes, connected by way of vertical strips or wires, the strips or wires in the lower horizontal plane being formed as inwardly pointing prongs.
    Type: Grant
    Filed: June 21, 1979
    Date of Patent: September 1, 1981
    Assignee: Bertha-Maria van Rooijen-Nieuwenhijs
    Inventor: Rudolf J. A. M. van Rooijen