Patents by Inventor Cheng L. Kwan

Cheng L. Kwan 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: 4585423
    Abstract: A toy aeroplane composed of a fuselage, a gear box fixed to the fuselage, a wheel axle holder rotatably mounted in the gear box, a wheel axle which extends rotatably through the gear box and the wheel axle holder and which carries a wheel at each end thereof, a further wheel which is rotatably mounted to the fuselage in front of the gear box, an electric motor mounted in the gear box, a reduction gear mounted in the gear box for transmitting rotation of the electric motor to the wheel axle and to the wheel axle holder and a crank mounted in the gear box for periodically changing the direction of rotation of the wheel axle holder. The axis of rotation of the wheel axle holder is perpendicular to the wheel axle and extends downwardly from the rear to the front of the toy aeroplane, whereby in use, the toy aeroplane turns and tilts alternately to the left and to the right.
    Type: Grant
    Filed: April 11, 1984
    Date of Patent: April 29, 1986
    Assignee: Hang Tjuk Industrial Co. Ltd.
    Inventor: Cheng L. Kwan
  • Patent number: D315029
    Type: Grant
    Filed: March 20, 1987
    Date of Patent: February 26, 1991
    Assignee: Hang Tjuk Industrial Co., Ltd.
    Inventor: Cheng L. Kwan
  • Patent number: D324892
    Type: Grant
    Filed: April 3, 1989
    Date of Patent: March 24, 1992
    Assignee: Hung Chuk Industrial Company Limited
    Inventor: Cheng L. Kwan