Patents by Inventor Yaodong Dai

Yaodong Dai 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).

  • Device for preventing and treating myopia
    Patent number: 7726812
    Abstract: A device for preventing and treating myopia includes a base, a spectacles frame (1), a holder (3) and a lens (2). The holder (3) is mounted on the base; a visual target (4) is placed on the base. The spectacles frame (1) is connected to the holder (3) by adjustable connecting parts (31,32,33,34,35), so the distance between the spectacles frame (1) and the visual target (4) which is placed on the base is adjustable.
    Type: Grant
    Filed: December 20, 2004
    Date of Patent: June 1, 2010
    Inventors: Minghua Dai, Yaodong Dai
  • Device for Preventing and Treating Myopia
    Publication number: 20090040459
    Abstract: A device for preventing and treating myopia includes a base, a spectacles frame (1), a holder (3) and a lens (2). The holder (3) is mounted on the base; a visual target (4) is placed on the base. The spectacles frame (1) is connected to the holder (3) by adjustable connecting parts (31,32,33,34,35), so the distance between the spectacles frame (1) and the visual target (4) which is placed on the base is adjustable.
    Type: Application
    Filed: December 20, 2004
    Publication date: February 12, 2009
    Inventors: Minghua Dai, Yaodong Dai