Patents by Inventor John Joseph Krewalk

John Joseph Krewalk 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: 7618330
    Abstract: Disclosed herein is a golf club, comprising a shaft and a golf club head disposed at one end of the shaft. The golf club head has a face on a front of the golf club head, a cavity surface on a back of the golf club head, and a bottom flange extending from a bottom edge of the face to a bottom edge of the cavity. The bottom flange has a plurality of grooved channels extending across a width of the bottom flange of the golf club head, such that the golf club head provides a flow path, permitting a medium to flow through the grooved channels, thereby reducing resistance to motion of the golf club head during play.
    Type: Grant
    Filed: September 21, 2007
    Date of Patent: November 17, 2009
    Inventors: John Joseph Krewalk, Michael Malerba