TREA

Steven B. Hirsch

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  • Beverly Hills, CA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Unitary key panel
    • Patent number 4,644,326
    • Issue date Feb 17, 1987
    • Secure Keyboards Limited
    • Luis Villalobos
    • G07 - CHECKING-DEVICES
  • Information Patent Grant

    Secure input system
    • Patent number 4,479,112
    • Issue date Oct 23, 1984
    • Secure Keyboards Limited
    • Steven B. Hirsch
    • G06 - COMPUTING CALCULATING COUNTING
  • Information Patent Grant

    Secure keyboard input terminal
    • Patent number 4,333,090
    • Issue date Jun 1, 1982
    • Steven B. Hirsch
    • G07 - CHECKING-DEVICES