Patents by Inventor Zhigang Du

Zhigang Du has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

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    Patent number: D929557
    Type: Grant
    Filed: January 22, 2020
    Date of Patent: August 31, 2021
    Inventor: Zhigang Du
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    Patent number: D932588
    Type: Grant
    Filed: March 26, 2020
    Date of Patent: October 5, 2021
    Inventor: Zhigang Du
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    Patent number: D932589
    Type: Grant
    Filed: March 30, 2020
    Date of Patent: October 5, 2021
    Inventor: Zhigang Du