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Karl H. Hellman

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  • Ann Arbor, MI, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    HCCI engine with combustion-tailoring chamber
    • Patent number 6,910,459
    • Issue date Jun 28, 2005
    • The United States of America as represented by the Administration of the U.S....
    • Ruonan Sun
    • Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
  • Information Patent Grant

    Individual cylinder coolant control system and method
    • Patent number 6,810,838
    • Issue date Nov 2, 2004
    • Karl Harry Hellman
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Pumped EGR system
    • Patent number 6,386,154
    • Issue date May 14, 2002
    • The United States of America as represented by the Administrator of the Envir...
    • Karl H. Hellman
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Multi-stage combustion engine
    • Patent number 5,609,131
    • Issue date Mar 11, 1997
    • The United States of America as represented by the Administrator of the U. S....
    • Charles L. Gray
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Accumulator engine
    • Patent number 5,579,640
    • Issue date Dec 3, 1996
    • The United States of America as represented by the Administrator of the Envir...
    • Charles L. Gray
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Combined cycle engine
    • Patent number 5,549,087
    • Issue date Aug 27, 1996
    • The United States of America as represented by the Administrator of the U. S....
    • Charles L. Gray
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Anti-lock regenerative braking system
    • Patent number 5,505,527
    • Issue date Apr 9, 1996
    • The United States of America as represented by the Administrator, U.S. Enviro...
    • Charles L. Gray
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Hybrid powertrain vehicle
    • Patent number 5,495,912
    • Issue date Mar 5, 1996
    • The United States of America as represented by the Administrator of the U. S....
    • Charles L. Gray
    • B60 - VEHICLES IN GENERAL

Patents Applicationslast 30 patents