Patents by Inventor Mark J. Schoofs

Mark J. Schoofs 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).

  • Hand paddle for use by swimmers
    Patent number: 4832643
    Abstract: A hand paddle for use in swimming is disclosed which comprises a glove-like body having an interior recess for receiving a human hand, said body having a relatively flat bottom surface and a convex upper surface, the upper surface being cambered longitudinally and laterally so that the highest point of the upper surface is centrally located in that surface.
    Type: Grant
    Filed: September 19, 1984
    Date of Patent: May 23, 1989
    Inventor: Mark J. Schoofs
  • Swim fin for breaststroke swimmers
    Patent number: 4521220
    Abstract: A swim fin for use by breaststroke swimmers is described. The swim fin has a shoe-like rear compartment and a closed forward extension from said compartment. The forward extension has a relatively flat bottom surface and a curved convex upper surface, so cambered that the thickness of the extension at its inner side is substantially the thickness at the outer side.
    Type: Grant
    Filed: October 3, 1984
    Date of Patent: June 4, 1985
    Inventor: Mark J. Schoofs