Patents by Inventor Tung S. Yeung

Tung S. Yeung 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: 5190489
    Abstract: An inflatable swimming support adapted to be worn upon the upper arm of a user, the support comprising a major continuous and closed, torus-shaped air chamber formed of fluid-impervious, flexible material, the major air chamber forming a tubular central arm opening therethrough; a minor continuous and closed, torus-shaped air chamber formed of a strip of fluid-impervious, flexible material, the strip being heat sealed to the material of the major air chamber interiorly along two concentric circular lines and forming a central arm opening therethrough; a first valve means in fluid communication with the major air chamber for the selective inflation and deflation thereof; and a second valve means in fluid communication with the minor air chamber independent of the major air chamber for the selective inflation and deflation of the minor air chamber, the first and second valve means being located in spaced relationship along the length of the central arm opening.
    Type: Grant
    Filed: January 27, 1992
    Date of Patent: March 2, 1993
    Assignee: Sunco Products, Inc.
    Inventor: Tung S. Yeung