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Changwen Li

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Patents Grantslast 30 patents

Patents Applicationslast 30 patents

  • Information Patent Application

    CONFORMABLE PLEATED AIR FILTER WITH BRIDGING FILAMENTS
    • Publication number 20230372854
    • Publication date Nov 23, 2023
    • 3M Innovative Properties Company
    • Changwen Li
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Application

    CONFORMABLE PLEATED AIR FILTER WITH BRIDGING FILAMENTS
    • Publication number 20180021716
    • Publication date Jan 25, 2018
    • 3M Innovative Properties Company
    • Changwen Li
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Application

    WINDOW AIR FILTER
    • Publication number 20170241193
    • Publication date Aug 24, 2017
    • 3M Innovative Properties Company
    • Andrew R. Fox
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Application

    AIR FILTER
    • Publication number 20170028338
    • Publication date Feb 2, 2017
    • 3M Innovative Properties Company
    • Liming Xin
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL