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J. Cornelis Kerkhoff

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  • Rosedale, CA
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Patents Grantslast 30 patents

  • Information Patent Grant

    Apparatus for aerating and draining
    • Patent number 8,734,051
    • Issue date May 27, 2014
    • Buildworks Systems, Inc.
    • Dirk Marinus Kerkhoff
    • C05 - FERTILISERS MANUFACTURE THEREOF
  • Information Patent Grant

    Apparatus for aerating and draining
    • Patent number 8,708,603
    • Issue date Apr 29, 2014
    • Buildworks Systems, Inc.
    • Dirk M. Kerkhoff
    • C05 - FERTILISERS MANUFACTURE THEREOF

Patents Applicationslast 30 patents

  • Information Patent Application

    APPARATUS FOR AERATING AND DRAINING
    • Publication number 20110204529
    • Publication date Aug 25, 2011
    • BUILDWORKS SYSTEMS INC.
    • Dirk M. Kerkhoff
    • C05 - FERTILISERS MANUFACTURE THEREOF