TREA

Douglas L. Neuenfeldt

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  • Anoka, MN, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Filter housing for filter fan
    • Patent number 10,512,866
    • Issue date Dec 24, 2019
    • Hoffman Enclosures, Inc.
    • Seng Chang
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Air conditioner
    • Patent number D803365
    • Issue date Nov 21, 2017
    • Hoffman Enclosures, Inc.
    • Richard L. Raisanen
    • D23 - Environmental heating and cooling
  • Information Patent Grant

    Air conditioner cover
    • Patent number D739928
    • Issue date Sep 29, 2015
    • Hoffman Enclosures, Inc.
    • Richard L. Raisanen
    • D23 - Environmental heating and cooling

Patents Applicationslast 30 patents

  • Information Patent Application

    Filter Housing for Filter Fan
    • Publication number 20170232373
    • Publication date Aug 17, 2017
    • Hoffman Enclosures, Inc.
    • Seng Chang
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL