Patents by Inventor Michael S. Sulprizio

Michael S. Sulprizio 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: 4377288
    Abstract: A tennis racket strung with a string grid, each strand of which has a cross-section defining a polygon with concave sides thus providing the grid strands with longitudinally extending concave surfaces which meet to form longitudinally extending sharp edges. At each junction between the strands of the string grid the sharp edges contact each other only at four sharply defined spaced points thus locking the strands to each other at each junction. In weaving the string grid substantial rectilinearity of the concave surfaces and sharp edges of the strands is maintained.
    Type: Grant
    Filed: April 13, 1981
    Date of Patent: March 22, 1983
    Inventor: Michael S. Sulprizio