Patents by Inventor Donald Michael Ligrani, Jr.

Donald Michael Ligrani, Jr. 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 putter
    Patent number: D549292
    Type: Grant
    Filed: September 19, 2006
    Date of Patent: August 21, 2007
    Assignee: DDK, LLC
    Inventors: Douglas Eugene Meier, Keith Timothy Decker, Donald Michael Ligrani, Jr.
  • Alignment features for golf putters
    Patent number: D603922
    Type: Grant
    Filed: December 10, 2008
    Date of Patent: November 10, 2009
    Assignee: DDK, LLC
    Inventors: Douglas Eugene Meier, Keith Timothy Decker, Donald Michael Ligrani, Jr.