Patents by Inventor Li-Mei Chang

Li-Mei 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).

  • Foldable skate board scooter
    Patent number: 6270095
    Abstract: A foldable skate board assembly includes a board having a front wheel and a rear wheel attached thereto, two mounting seats mounted on the board and each including a first notch and a second notch, and a steering column including a lower end attached to the front wheel to move therewith and an upper end. The steering column includes an inclined extension pivotally connected between the mounting seats by a pivotal pin. Two handles are attached to the upper end of the steering column. A slider is slidably mounted to the inclined extension of the steering column. A positioning member is mounted to the slider to move therewith. An elastic element is mounted between the pivotal pin and the slider.
    Type: Grant
    Filed: April 25, 2000
    Date of Patent: August 7, 2001
    Inventor: Li-Mei Chang
  • Self walking vehicle body
    Patent number: D449081
    Type: Grant
    Filed: February 21, 2001
    Date of Patent: October 9, 2001
    Inventor: Li-Mei Chang