Patents by Inventor Jerry R. Lundquist

Jerry R. Lundquist 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).

  • Permanent magnet biased narrow track magnetoresistive transducer
    Patent number: 4623867
    Abstract: A narrow track magnetoresistive transducer has a square shaped bias permanent magnet superposed with an MR element. The square shaped magnet provides bias field components of substantially the same magnitude in both hard and easy axis directions of the MR element. A stable and uniform bias field is thereby obtained.
    Type: Grant
    Filed: August 13, 1984
    Date of Patent: November 18, 1986
    Assignee: Ampex Corporation
    Inventors: Jerry R. Lundquist, H. Neal Bertram
  • Process of making silicon dioxide films for use as wear resistant coatings in video and digital magnetic recording
    Patent number: 4268369
    Abstract: A magnetic recording medium of improved durability is obtained by depositing a coating of silicon dioxide over a magnetic metallic film.
    Type: Grant
    Filed: August 30, 1979
    Date of Patent: May 19, 1981
    Assignee: Ampex Corporation
    Inventors: Malcolm Barlow, Jerry R. Lundquist
  • Magnetic recording disc of improved durability having tin-nickel undercoating
    Patent number: 4029541
    Abstract: A magnetic disc of improved durability is provided which has an undercoating of a relatively thick tin-nickel layer with a cobalt-containing magnetic layer over said tin-nickel layer and having an oxidized surface.
    Type: Grant
    Filed: February 19, 1976
    Date of Patent: June 14, 1977
    Assignee: Ampex Corporation
    Inventors: Malcolm Barlow, Jerry R. Lundquist