Patents by Inventor Leo Lichtenstein

Leo Lichtenstein 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: 4913430
    Abstract: A racket having intersecting strings is disclosed in conjunction with a plurality of orthogonal protrusions made from metallic wires extending through and fixedly positioned at the intersections of the strings for the purpose of enhancing the frictional grip between the racket and the ball during impact. This construction makes it easier to execute "drop shots", "slicing strokes", "top spin" and "under spin" shots. The protrusions allow greater ball control as well as prolonging the life of the strings. The wire protrusions produce a gripping action having better frictional contact between the strings of the racket, such as a tennis racket, and the ball when it is hit. The protrusions can be provided on one as well as both sides of the intersections along the same axial line, such as, by twisting the wires and forming protrusion end surfaces that are substantially parallel to the surface of the plane of the strings with a tooth-like gripping action and improved ball control.
    Type: Grant
    Filed: January 20, 1988
    Date of Patent: April 3, 1990
    Inventor: Leo Lichtenstein