Patents by Inventor Ma Cheuk Man

Ma Cheuk Man 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).

  • Roller coaster toy
    Patent number: 6572434
    Abstract: A roller coaster toy includes a set of cars mounted on a track. Each car has at least one pair of movable side wheel assemblies mounted for movement towards and away from opposite sides of a respective car to enable the cars to be easily placed on, or removed from, the track. A drive car has movable drive wheels for affirmatively engaging the track no matter the degree of curvature of the track.
    Type: Grant
    Filed: July 19, 2001
    Date of Patent: June 3, 2003
    Assignee: Echo Toys Ltd.
    Inventor: Ma Cheuk Man
  • Roller coaster toy
    Publication number: 20030017782
    Abstract: A roller coaster toy includes a set of cars mounted on a track. Each car has at least one pair of movable side wheel assemblies mounted for movement towards and away from opposite sides of a respective car to enable the cars to be easily placed on, or removed from, the track. A drive car has movable drive wheels for affirmatively engaging the track no matter the degree of curvature of the track.
    Type: Application
    Filed: July 19, 2001
    Publication date: January 23, 2003
    Inventor: Ma Cheuk Man