Patents by Inventor Weifu Zhang

Weifu Zhang 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).

  • Publication number: 20090223056
    Abstract: A power shaver having a hand-cranked dynamo is disclosed. The shaver includes a battery that can be charged by the hand-cranked dynamo, or from an alternating current adaptor that delivers charge from another battery, or from a charger that connects to a conventional source of alternating current. The shaver includes a foldable handle that allows a user to operate the dynamo, and folds against the body of the shaver when not in use. Indication lights located on the body of the shaver provide charging and status information to a user.
    Type: Application
    Filed: September 19, 2008
    Publication date: September 10, 2009
    Inventors: Troy D. Wilson, Xingrong Zhang, Weifu Zhang