一種口罩

Translated title of the contribution: A Mask

Research output: Patent, Agreements, AssignmentsPatent

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  • 2021

    一種口罩

    KO, W. Y. A., 28 Dec 2021, China National Intellectual Property Administration, Patent No. CN202120805013.1, 20 Apr 2021, Priority date 22 Jan 2021, Priority No. 2021-01-22 HK 32021024155.2

    Research output: Patent, Agreements, AssignmentsPatent