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Erasing heads using permanent magnets

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  • CPC
  • G11B5/325
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Parent Industries

GPHYSICS G11Information storage G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER G11B5/00Recording by magnetisation or demagnetisation of a record carrier Reproducing by magnetic means Record carriers therefor

Current Industry

G11B5/325Erasing heads using permanent magnets
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Data storage drive with dedicated erase transducer
    • Patent number 11,929,104
    • Issue date Mar 12, 2024
    • Seagate Technology LLC
    • Lihong Zhang
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Tape erase element included in a tape erase device to erase a tape...
    • Patent number 11,837,263
    • Issue date Dec 5, 2023
    • International Business Machines Corporation
    • David Harper
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic head
    • Patent number 10,475,472
    • Issue date Nov 12, 2019
    • Insurgo Media Services Ltd
    • Roy Spiller
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Data erasure apparatus and data erasure method
    • Patent number 7,646,579
    • Issue date Jan 12, 2010
    • Hitachi Global Storage Technologies Netherlands B.V.
    • Mitsuru Kitamura
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Erasure techniques for magnetic tape media
    • Patent number 6,822,827
    • Issue date Nov 23, 2004
    • Imation Corp.
    • John E. Heinz
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Movable full erasing head
    • Patent number 5,742,460
    • Issue date Apr 21, 1998
    • Daewoo Electronics Co., Ltd.
    • Ki-Young Park
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic media erasure system
    • Patent number 5,132,860
    • Issue date Jul 21, 1992
    • Paul W. Von Stein
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Method for making permanent magnet type demagnetizing head
    • Patent number 5,078,944
    • Issue date Jan 7, 1992
    • Matsushita Electric Industrial Co., Ltd.
    • Tuyoshi Yoshino
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Permanent magnet type erasing head
    • Patent number 4,965,688
    • Issue date Oct 23, 1990
    • Matsushita Electric Industrial Co., Ltd.
    • Tuyoshi Yoshino
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic erase head with terminator magnets on the ends
    • Patent number 4,893,208
    • Issue date Jan 9, 1990
    • Eastman Kodak Company
    • Richard J. McClure
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Permanent magnet type demagnetizing head
    • Patent number 4,882,559
    • Issue date Nov 21, 1989
    • Matsushita Electric Industrial Co., Ltd.
    • Noboru Koizumi
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Erasing head
    • Patent number 4,706,145
    • Issue date Nov 10, 1987
    • TDK Corporation
    • Yasuyuki Hirabayashi
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magnetic erasing head
    • Patent number 4,613,919
    • Issue date Sep 23, 1986
    • Matsushita Electric Industrial Co., Ltd.
    • Norio Miyatake
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Method of magnetizing erasing head
    • Patent number 4,186,364
    • Issue date Jan 29, 1980
    • Olympus Optical Limited
    • Naohiro Hanaoka
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Method for manufacturing a multipolar erasing head
    • Patent number 4,146,956
    • Issue date Apr 3, 1979
    • Tokyo Shibaura Electric Co., Ltd.
    • Tatsuo Fujiwara
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Erase head
    • Patent number 4,141,052
    • Issue date Feb 20, 1979
    • Olympus Optical Co., Ltd.
    • Naohiro Hanaoka
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Tape recorder with pivotal erase head bearing
    • Patent number 3,949,422
    • Issue date Apr 6, 1976
    • Sony Corporation
    • Shoji Sato
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    3800327
    • Patent number 3,800,327
    • Issue date Mar 26, 1974
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    3772471
    • Patent number 3,772,471
    • Issue date Nov 13, 1973
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    3624572
    • Patent number 3,624,572
    • Issue date Nov 30, 1971
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    3548113
    • Patent number 3,548,113
    • Issue date Dec 15, 1970
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    3351717
    • Patent number 3,351,717
    • Issue date Nov 7, 1967
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    2690340
    • Patent number 2,690,340
    • Issue date Sep 28, 1954
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    2617890
    • Patent number 2,617,890
    • Issue date Nov 11, 1952
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    2526358
    • Patent number 2,526,358
    • Issue date Oct 17, 1950
    • G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents