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Otto Knottnerus

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  • Evansville, WI, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Fluid filter apparatus and methods
    • Patent number 8,617,404
    • Issue date Dec 31, 2013
    • Harvard Corporation
    • Otto Knottnerus
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Fluid filter apparatus and methods
    • Patent number 7,938,971
    • Issue date May 10, 2011
    • Harvard Corporation
    • Otto Knottnerus
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL

Patents Applicationslast 30 patents

  • Information Patent Application

    Fluid Filter Apparatus and Methods
    • Publication number 20110203697
    • Publication date Aug 25, 2011
    • HARVARD CORPORATION
    • Otto Knottnerus
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Application

    Fluid Filter Apparatus and Methods
    • Publication number 20090107926
    • Publication date Apr 30, 2009
    • HARVARD CORPORATION
    • Otto Knottnerus
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL