TREA

David W. Ziemann

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  • Coon Rapids, MN, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Framed air filter with stabilizing flap
    • Patent number 12,263,433
    • Issue date Apr 1, 2025
    • 3M Innovative Properties Company
    • Fiona E. Menken
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Air filter comprising frame with bowed inner edge
    • Patent number 10,921,020
    • Issue date Feb 16, 2021
    • 3M Innovative Properties Company
    • Glen O. Gregerson
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL

Patents Applicationslast 30 patents

  • Information Patent Application

    Framed Air Filter with Stabilizing Flap
    • Publication number 20240207769
    • Publication date Jun 27, 2024
    • 3M Innovative Properties Company
    • Fiona E. Menken
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Application

    AIR FILTER COMPRISING FRAME WITH BOWED INNER EDGE
    • Publication number 20190242616
    • Publication date Aug 8, 2019
    • 3M Innovative Properties Company
    • Glen O. Gregerson
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL