Patents by Inventor Wing Sheung Yu

Wing Sheung Yu 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: D453451
    Type: Grant
    Filed: April 30, 2001
    Date of Patent: February 12, 2002
    Assignee: Keysun Industrial Company Limited
    Inventor: Wing Sheung Yu