TREA

Shuk Kwan Mak

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  • Hong Kong, CN
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Patents Grantslast 30 patents

  • Information Patent Grant

    Alloy with interference thin film and method for making the same
    • Patent number 12,077,839
    • Issue date Sep 3, 2024
    • CHOW SANG SANG JEWELLERY COMPANY LIMITED
    • Wai Kei Cheung
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
  • Information Patent Grant

    Amorphous alloy
    • Patent number 12,054,819
    • Issue date Aug 6, 2024
    • CHOW SANG SANG JEWELLERY COMPANY LIMITED
    • Wai Kei Cheung
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    Jewelry alloy
    • Patent number 11,268,174
    • Issue date Mar 8, 2022
    • CHOW SANG SANG JEWELLERY COMPANY LIMITED
    • Wai Kei Cheung
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    Platinum electrodeposition bath and uses thereof
    • Patent number 10,612,149
    • Issue date Apr 7, 2020
    • CHOW SANG SANG JEWELLERY COMPANY LIMITED
    • Wai Kei Cheung
    • C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR

Patents Applicationslast 30 patents