Patents by Inventor Sue-Zeng Yang

Sue-Zeng Yang 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).

  • Reliably sensing bubble leveling means
    Patent number: 6647634
    Abstract: A bubble leveling device includes a bubble level having a gas bubble formed on a liquid surface, an illuminator projecting light through or towards the gas bubble for producing an optical image of the gas bubble, and a sensor having a coordinate screen for locating the image of the gas bubble on the screen for checking the coincidence or deviation of the image with or from the coordinate center of the screen for reliably checking the horizontality or inclination angle as measured by the bubble leveling device.
    Type: Grant
    Filed: May 7, 2002
    Date of Patent: November 18, 2003
    Inventors: Sue-Zeng Yang, Hou-Ging Chin
  • Reliably sensing bubble leveling means
    Publication number: 20020189116
    Abstract: A bubble leveling device includes a bubble level having a gas bubble formed on a liquid surface, an illuminator projecting light through or towards the gas bubble for producing an optical image of the gas bubble, and a sensor having a coordinate screen for locating the image of the gas bubble on the screen for checking the coincidence or deviation of the image with or from the coordinate center of the screen for reliably checking the horizontality or inclination angle as measured by the bubble leveling device.
    Type: Application
    Filed: May 7, 2002
    Publication date: December 19, 2002
    Inventors: Sue-Zeng Yang, Hou-Ging Chin