Patents by Inventor Duane Michael Sulak

Duane Michael Sulak 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).

  • Insole bottom design
    Patent number: D515292
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: February 21, 2006
    Assignee: Spenco Medical Corporation
    Inventors: David Bradley Granger, Duane Michael Sulak
  • Insole design
    Patent number: D497708
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: November 2, 2004
    Assignee: Spenco Medical Corporation
    Inventors: David Bradley Granger, Duane Michael Sulak, Jacob Anthony Martinez