Patents by Inventor Guustaaf Gysbert Berkelaar

Guustaaf Gysbert Berkelaar 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).

  • Mobile wire spool carrier
    Patent number: D802866
    Type: Grant
    Filed: July 18, 2016
    Date of Patent: November 14, 2017
    Assignee: Willberk Inventions Inc.
    Inventors: David Edward Williams, Guustaaf Gysbert Berkelaar
  • Support for a wire spool carrier
    Patent number: D811857
    Type: Grant
    Filed: July 18, 2016
    Date of Patent: March 6, 2018
    Assignee: Willberk Inventions Inc.
    Inventors: David Edward Williams, Guustaaf Gysbert Berkelaar