Patents by Inventor Robert Marte

Robert Marte 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: 5129656
    Abstract: In a racquet, in particular, a tennis racquet, which incorporates a frame, an open or closed heart piece, and a shaft (2) that is joined to the heart piece, with the frame, heart piece and shaft being formed in one piece or connected releasably to each other, the grip (1) that is formed as a one-piece sleeve can be slid onto the shaft. The inside profile of the cross section of the grip (1) and the outside profile of the cross section of the shaft (2) incorporate longitudinal shape-locking and interacting supporting surfaces. The spacing between the supporting surfaces on the shaft (2) and the supporting surfaces of the grip (1) tapers in a wedge shape towards the unattached end (11) of the shaft (2). A removable distance piece (3) that prevents the grip (1) being slid axially into the mated position is releasably connected to the end (11) of the shaft. With the distance piece (3) installed on the shaft, the racquet can be tested with various grips (1).
    Type: Grant
    Filed: July 26, 1991
    Date of Patent: July 14, 1992
    Assignee: Head Sportgerate Gesellschaft m.b.H. & Co. OHG
    Inventors: Robert Marte, Helmut Umlauft
  • Patent number: D348093
    Type: Grant
    Filed: January 25, 1991
    Date of Patent: June 21, 1994
    Assignee: Head Sportgerate Gesellschaft m.b.H. & Co. OHG
    Inventors: Robert Marte, Helmut Umlauft