Patents by Inventor John Geoffrey Chang

John Geoffrey Chang 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).

  • Toothbrush
    Publication number: 20150230596
    Abstract: A toothbrush having a body, a brush head, and a neck extending between the body and the brush head is described. The brush head having a forward face and a rear face, and a massaging element disposed on the rear face of the brush head. The massaging element has a base surface which is non-coplanar with the rear face, and the massaging element comprising a plurality of protrusions. A plurality of bristles extends from the forward face.
    Type: Application
    Filed: April 30, 2015
    Publication date: August 20, 2015
    Inventors: John Geoffrey Chang, Douglas A. Gall