Patents by Inventor Karel Willem Pierret

Karel Willem Pierret 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).

  • Backpack with rear tunnel
    Patent number: D480866
    Type: Grant
    Filed: December 26, 2001
    Date of Patent: October 21, 2003
    Inventors: Johan Maria Alfons, Karel Willem Pierret