Patents by Inventor Chung Kai Hsiao

Chung Kai Hsiao 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).

  • Carrier having device for assisting stair climbing
    Publication number: 20030098552
    Abstract: A carrier includes a base, a number of wheels attached to the base, and a spring biasing device for engaging with the stairs and for biasing the base while the base is moved relative to stairs, in order to facilitate the base of the carrier upstairs or downstairs. One or more posts are secured to the base, and one or more barrels are slidably engaged on the posts for engaging with the stairs. The spring biasing device includes a number of springs engaged with the barrels for for applying biasing forces against the barrels when the barrels are engaged with the stairs.
    Type: Application
    Filed: November 27, 2001
    Publication date: May 29, 2003
    Inventor: Chung Kai Hsiao