TREA

Louis Tubman

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  • Philadelphia, PA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Sound recording
    • Patent number 5,820,384
    • Issue date Oct 13, 1998
    • Louis Tubman
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
  • Information Patent Grant

    Acoustical prompt recording system and method
    • Patent number 5,569,038
    • Issue date Oct 29, 1996
    • Louis Tubman
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS