Patents by Inventor Frank C. Donofrio, Sr.

Frank C. Donofrio, Sr. 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: 5228689
    Abstract: A multi-loft golf club that provides a golfer with a more conventional mode of play. More than one club can make up a set. A six iron lofted head mounted in line with the shaft hozel can be closed incrementally to yield eight club positions, a 6,5,4,3,2,1, driver and a putter. The second club, with a 60 degree lofted head mounted in line with the shaft hozel can in a like manner yield eight club positions, a 60 degree sand wedge, 56 degree wedge, 52 degree wedge, pitching wedge, 9,8,7, and another 6 iron . . .being useful when a second player shares the club set. The high lofted club being broader in the club face and with more weight is fitted with a shorter club shaft and the low lofted club with less weight being fitted with a longer club shaft for greater distance; requiring higher velocity.
    Type: Grant
    Filed: April 6, 1992
    Date of Patent: July 20, 1993
    Inventor: Frank C. Donofrio, Sr.