TREA

DAVID T. CHANG

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  • University Heights, OH, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Diffuser for essential oils
    • Patent number 10,967,092
    • Issue date Apr 6, 2021
    • Greenair Inc.
    • David T. Chang
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL

Patents Applicationslast 30 patents

  • Information Patent Application

    DIFFUSER FOR ESSENTIAL OILS
    • Publication number 20200330637
    • Publication date Oct 22, 2020
    • GREENAIR INC.
    • DAVID T. CHANG
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Application

    ADJUSTABLE DIFFUSER FOR MULTIPLE ESSENTIAL OILS
    • Publication number 20200330721
    • Publication date Oct 22, 2020
    • GREENAIR INC.
    • DAVID T. CHANG
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE