TREA

Dusan John Hvolka

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  • Salt Lake City, UT, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Two speed gearbox
    • Patent number 7,537,536
    • Issue date May 26, 2009
    • Dusan J. Hvolka
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Loader linkage
    • Patent number 6,957,705
    • Issue date Oct 25, 2005
    • Deere & Company
    • David Michael O'Brien
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Two speed gearbox
    • Patent number 6,935,986
    • Issue date Aug 30, 2005
    • Darwin Industries, Inc.
    • Dusan J. Hvolka
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Two speed gear box
    • Patent number 6,616,567
    • Issue date Sep 9, 2003
    • Terex Corporation
    • Victor R. Strong
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Shuttlecar wheel end
    • Patent number 5,356,351
    • Issue date Oct 18, 1994
    • Eimco Mining Machinery (Proprietary) Limited
    • Dusan J. Hvolka
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Direct drive axle brake and cooling system
    • Patent number 5,190,123
    • Issue date Mar 2, 1993
    • Cannon Engineering Technologies, Inc.
    • Dusan J. Hvolka
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Multi-purpose uni-body digging service vehicle
    • Patent number 5,147,011
    • Issue date Sep 15, 1992
    • DJH Engineering Center, Inc.
    • Dusan J. Hvolka
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Multi-purpose articulated drag arm digging and hauling vehicle
    • Patent number 5,141,384
    • Issue date Aug 25, 1992
    • Dusan J. Hvolka
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Multi-purpose articulated bucket lift digging and hauling vehicle
    • Patent number 5,120,182
    • Issue date Jun 9, 1992
    • Dusan J. Hvolka
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Multi-purpose service vehicle
    • Patent number 5,082,082
    • Issue date Jan 21, 1992
    • DJH Engineering Center, Inc.
    • Dusan J Hvolka
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Variable speed transmission
    • Patent number 4,856,378
    • Issue date Aug 15, 1989
    • DJH Engineering Center, Inc.
    • Dusan J. Hvolka
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

  • Information Patent Application

    Direct drive electric shift two speed planetary gearbox
    • Publication number 20100267508
    • Publication date Oct 21, 2010
    • DJH Engineering Center, Inc.
    • Dusan J. Hvolka
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Two speed planetary electric shift gearbox
    • Publication number 20090247346
    • Publication date Oct 1, 2009
    • DJH Engineering Center, Inc.
    • Dusan J. Hvolka
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Two speed gearbox
    • Publication number 20070287575
    • Publication date Dec 13, 2007
    • Dusan J. Hvolka
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Loader linkage
    • Publication number 20050045351
    • Publication date Mar 3, 2005
    • David Michael O'Brien
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    Two speed gearbox
    • Publication number 20040266576
    • Publication date Dec 30, 2004
    • Darwin Industries, Inc.
    • Dusan J. Hvolka
    • B60 - VEHICLES IN GENERAL
  • Information Patent Application

    Two speed gear box
    • Publication number 20020119860
    • Publication date Aug 29, 2002
    • Victor R. Strong
    • B60 - VEHICLES IN GENERAL