Patents by Inventor Dale M. Hiller

Dale M. Hiller 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).

  • Low CnO.sub.2 loading, high coercivity thermomagnetic tape duplication
    Patent number: 4907103
    Abstract: An improved high speed process for thermomagnetic duplications of color video tapes employing, as the copy tape, tape having a chromium dioxide loading of approximately 10 to 60 mg/dm.sup.2. Also a prerecorded tape made by the improved process.
    Type: Grant
    Filed: January 14, 1987
    Date of Patent: March 6, 1990
    Assignee: Otari Electric Company, Ltd.
    Inventor: Dale M. Hiller
  • Nonmagnetic particles to improve properties of magnetic recording compositions
    Patent number: 4568619
    Abstract: Ferromagnetic recording elements with improved physical properties have from 20 to 50% of the volume of ferromagnetic particles replaced by nonmagnetic particles of a size smaller than the thickness of the magnetic layer.
    Type: Grant
    Filed: June 9, 1983
    Date of Patent: February 4, 1986
    Assignee: E. I. Du Pont De Nemours and Company
    Inventor: Dale M. Hiller