Patents by Inventor Joseph M. Martelli

Joseph M. Martelli 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: 5009420
    Abstract: A batting practice method using a batting practice device to restrain the batter's hips against certain movement while the batter is swinging the bat. The batting practice device is coupled to the batter and to a fixed location, and the batter executes a batting stroke as though a ball were moving along a path from one location and with the batter being located along the path intermediate such location and the fixed location. The batting practice device restrains the batter's hips against significant movement toward such one location while allowing the hips to pivot as the batter executes the batting stroke.
    Type: Grant
    Filed: December 23, 1988
    Date of Patent: April 23, 1991
    Inventor: Joseph M. Martelli