Patents by Inventor John N. Hansson

John N. Hansson 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).

  • Zirconia pen balls
    Patent number: 4621936
    Abstract: A liquid transfer ball formed from sintered zirconium oxide particles which exhibits utility as the ball element of a ball pen writing instrument to transfer ink from an ink reservoir to a writing surface such as paper. The ball exhibits a porosity of less than 8% by volume and is immune to corrosive action of inks.
    Type: Grant
    Filed: October 14, 1983
    Date of Patent: November 11, 1986
    Assignee: Corning Glass Works
    Inventors: John N. Hansson, Herbert L. Johns