TREA

Peter R. Helfet

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  • London, GB
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Patents Grantslast 30 patents

  • Information Patent Grant

    Optical disk recording performance
    • Patent number 5,406,540
    • Issue date Apr 11, 1995
    • Plasmon Data Systems, Inc.
    • Robert J. Longman
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Optical disk manufacture
    • Patent number 5,137,617
    • Issue date Aug 11, 1992
    • Plasmon Data Systems, Inc.
    • Peter R. Helfet
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Data storage medium
    • Patent number 5,008,687
    • Issue date Apr 16, 1991
    • Plasmon Limited
    • Robert J. Longman
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Optical data storage medium
    • Patent number 4,928,132
    • Issue date May 22, 1990
    • Plasmon Data Systems
    • Robert M. Pettigrew
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Magneto-optic data storage technique
    • Patent number 4,893,299
    • Issue date Jan 9, 1990
    • Victor C. Humberstone
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Pre-formatted moth-eye type optical data storage member and method
    • Patent number 4,866,696
    • Issue date Sep 12, 1989
    • Plasmon Data Systems, Inc.
    • Robert J. Longman
    • G02 - OPTICS
  • Information Patent Grant

    Data storage medium
    • Patent number 4,724,444
    • Issue date Feb 9, 1988
    • Plasmon Data Systems, Incorporated
    • Robert M. Pettigrew
    • G11 - INFORMATION STORAGE