TREA

David J. Schaefer

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  • Yankton, SD, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Control system for rail car cover system
    • Patent number 8,869,711
    • Issue date Oct 28, 2014
    • Strategic Rail Systems Company
    • Jerry R. Dimmer
    • B61 - RAILWAYS
  • Information Patent Grant

    Rail car cover system
    • Patent number 8,826,827
    • Issue date Sep 9, 2014
    • Strategic Rail Systems Company
    • Jerry R. Dimmer
    • B61 - RAILWAYS
  • Information Patent Grant

    Rail car cover system
    • Patent number 8,631,746
    • Issue date Jan 21, 2014
    • Rush Company, Inc.
    • Steve Knight
    • B61 - RAILWAYS
  • Information Patent Grant

    Rail car extension system
    • Patent number 8,141,498
    • Issue date Mar 27, 2012
    • Derrick K. Barr
    • B61 - RAILWAYS
  • Information Patent Grant

    Rail car cover system
    • Patent number 7,967,363
    • Issue date Jun 28, 2011
    • Shorma Company
    • David J. Schaefer
    • B61 - RAILWAYS
  • Information Patent Grant

    Retractable tarping system
    • Patent number 7,841,642
    • Issue date Nov 30, 2010
    • Shur Company
    • David Joseph Schaefer
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Rail car cover system
    • Patent number 7,823,515
    • Issue date Nov 2, 2010
    • Shur Company
    • David J. Schaefer
    • B61 - RAILWAYS
  • Information Patent Grant

    Grizzly screening apparatus
    • Patent number 6,336,560
    • Issue date Jan 8, 2002
    • Astec Industries, Inc.
    • David J. Schaefer
    • B07 - SEPARATING SOLIDS FROM SOLIDS SORTING
  • Information Patent Grant

    Grizzly screening apparatus
    • Patent number 6,098,811
    • Issue date Aug 8, 2000
    • Astec Industries, Inc.
    • David J. Schaefer
    • B07 - SEPARATING SOLIDS FROM SOLIDS SORTING

Patents Applicationslast 30 patents

  • Information Patent Application

    RAIL CAR COVER SYSTEM
    • Publication number 20110265684
    • Publication date Nov 3, 2011
    • Steve Knight
    • B61 - RAILWAYS
  • Information Patent Application

    RAIL CAR COVER SYSTEM
    • Publication number 20110030575
    • Publication date Feb 10, 2011
    • Shur Company
    • David J. Schaefer
    • B61 - RAILWAYS
  • Information Patent Application

    RETRACTABLE TARPING SYSTEM
    • Publication number 20100164246
    • Publication date Jul 1, 2010
    • Shur Company
    • David Joseph Schaefer
    • B60 - VEHICLES IN GENERAL
  • Information Patent Application

    RAIL CAR COVER SYSTEM
    • Publication number 20100037798
    • Publication date Feb 18, 2010
    • Shur Company
    • David J. Schaefer
    • B61 - RAILWAYS
  • Information Patent Application

    RAIL CAR EXTENSION SYSTEM
    • Publication number 20090260538
    • Publication date Oct 22, 2009
    • Shur Company
    • Christopher Joseph McCallum
    • B61 - RAILWAYS