TREA

Frank J. Otto

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  • Island Lake, IL, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Valve for water system
    • Patent number 5,452,744
    • Issue date Sep 26, 1995
    • Matrix IV, Inc.
    • Frank J. Otto
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Multi-functional valve
    • Patent number 5,139,050
    • Issue date Aug 18, 1992
    • Frank J. Otto
    • C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • Information Patent Grant

    Multi-functional valve
    • Patent number 5,107,896
    • Issue date Apr 28, 1992
    • Gianfrancesco; John J.
    • Frank J. Otto
    • C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE