Patents Assigned to PD Magnetics, B.V.
  • Magnetic recording element
    Patent number: 4732813
    Abstract: A magnetic recording element having a carrier and a magnetic coating provided thereon containing a magnetic pigment, a binder and a dispersing agent which is an amine or amide compound containing a sulfuric or sulfonic acid group.
    Type: Grant
    Filed: April 24, 1987
    Date of Patent: March 22, 1988
    Assignee: PD Magnetics, B.V.
    Inventors: Hendrikus F. Huisman, Henricus J. M. Pigmans