Patents by Inventor Erik N. Hardeng

Erik N. Hardeng 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).

  • System with filter system for improved reliability for recording data on a magnetic recording medium
    Patent number: 4845573
    Abstract: In an arrangement for recording data or a magnetic recording medium, the inputs of an amplifier whose outputs are connected to a magnetic head are preceded by filters which delay magnetic bias signals and data signals supplied to the amplifier and limit their steepness. Undesirably high voltages at the magnetic head as a consequence of excessively steep edges of a write current supplied to the magnetic head are thus avoided, and the reliability of the recording of the data on the magnetic recording medium is increased.
    Type: Grant
    Filed: August 14, 1987
    Date of Patent: July 4, 1989
    Assignee: Tandberg Data A/S
    Inventor: Erik N. Hardeng