Patents by Inventor Kou-Cheng Chang

Kou-Cheng 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).

  • Patent number: 5259806
    Abstract: A hula dancing doll which alternately moves its hips left and right while making a forward or turning motion on a performance stage and a Hawaiian melody is heard to give a lifelikeness that compares with a real hula dancer. The doll includes a body portion, a hip portion, and a base portion. The body portion resembles the head through waist of a human; the hip portion resembles the hip portion of a human. The body portion includes a conical housing with a base, a switch, a battery, a motor, a melody I. C., a speaker, a drive gear, a cam, a push rod, a rack gear, a hip gear, a drive wheel gear, two front wheels connected to an axle, two rear wheels connected to an axle, a shaft is connected at one end to the drive wheel gear and at the other end to a turning drive wheel. When the switch is turned on, the drive gear will turn the cam and drive wheel gear. The cam will move upward the push rod and the rack gear to turn the hip gear.
    Type: Grant
    Filed: August 31, 1992
    Date of Patent: November 9, 1993
    Inventor: Kou-Cheng Chang