Patents by Inventor Wilhelmus Stefanus Antonius Maria Bakx

Wilhelmus Stefanus Antonius Maria Bakx 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).

  • Roller skate
    Patent number: 6491308
    Abstract: A roller skate which includes a frame, a structure for fixing the frame to a person's foot, and at least two balls, which are freely rotatably supported by concave rollers. Axes of rotation of the rollers extend in a horizontal direction, transversely to the longitudinal direction of the frame. A roller is located between the two balls which are arranged side by side. The roller bears against both balls during operation.
    Type: Grant
    Filed: January 22, 2001
    Date of Patent: December 10, 2002
    Assignee: Ball-skate AG
    Inventor: Wilhelmus Stefanus Antonius Maria Bakx