Patents by Inventor Michael J. Hallack

Michael J. Hallack 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).

  • Scoreline pattern for a golf club head
    Patent number: D553700
    Type: Grant
    Filed: October 16, 2006
    Date of Patent: October 23, 2007
    Assignee: Callaway Golf Company
    Inventors: Augustin W. Rollinson, Luke R. Williams, Michael J. Hallack
  • Sole for a golf club head
    Patent number: D555745
    Type: Grant
    Filed: October 16, 2006
    Date of Patent: November 20, 2007
    Assignee: Callaway Golf Company
    Inventors: Augustin W. Rollinson, Luke R. Williams, Michael J. Hallack