Patents by Inventor John C. Unger

John C. Unger 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).

  • Method of fabricating magnets
    Patent number: 4388131
    Abstract: This disclosure relates to a bias field magnet for magnetic bubble memory devices which is formed of alternating layers of hard and soft ferrite powders which are subsequently fired together to form a magnetic structure. A particular embodiment of the present invention resides in a structure where the hard ferrite layer is encased on both its top and bottom surfaces by soft ferrite layers.
    Type: Grant
    Filed: December 22, 1980
    Date of Patent: June 14, 1983
    Assignee: Burroughs Corporation
    Inventors: John C. Unger, Sidney J. Schwartz, Ling G. Chow
  • Adjustable magnetic bias field structure for magnetic bubble devices
    Patent number: 4153948
    Abstract: An adjustable magnetic bias field structure for magnetic bubble devices. A pair of parallel facing magnetically permeable plates are adjustably separated by a number of threaded magnetically hard cylindrical rods or slugs slotted at one end. Threaded plastic rings fastened around holes provided in the pair of permeable plates engage the threads of the slotted rods to provide the adjustment feature. A magnetic bubble device is placed between the two permeable plates.
    Type: Grant
    Filed: February 27, 1978
    Date of Patent: May 8, 1979
    Assignee: Burroughs Corporation
    Inventors: Magid Y. Dimyan, John C. Unger