Patents by Inventor John A. Stefonsky

John A. Stefonsky 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).

  • Golf ball position marking system
    Patent number: 6017282
    Abstract: A golf ball position marking system that includes a position marker for marking the location of a ball and repositioning aid including a reference position marker having a reference direction indicator, which also serves as a reminder that a player has moved the original ball mark. The golf ball position marker includes a grass spike. The reference position marker is storable within a compartment formed within the golf ball position marker and includes a resilient bevel sided marker member with a raised direction indicating arrow and a central grass spike passage aperture.
    Type: Grant
    Filed: July 31, 1998
    Date of Patent: January 25, 2000
    Inventor: John A. Stefonsky