Patents by Inventor Wo Man Cheung

Wo Man Cheung 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: 6360661
    Abstract: A pre-inked hand stamp includes a platen carrying a microporous imaging member on its lower portion and having a centrally located threaded stem extending upward from its upper portion; an upper case member having an open bottom and a centrally located opening in its top, the stem of the platen extending through the centrally located opening; a spring and an adjustable stopping assembly coaxially mounted on the stem; and a handle threadably coupled to the end of the stem. The adjustable stopping assembly includes: a lower base member which is mounted in the central opening of the upper case member, a rotatable member which is mounted on the lower base member, and an upper threaded member which is mounted in the rotatable member, engaging it with a spline and groove structure. Rotation of the rotatable member causes rotation of the upper threaded member which results in movement of the upper threaded member along the threaded stem.
    Type: Grant
    Filed: February 3, 2000
    Date of Patent: March 26, 2002
    Assignee: Ho Feng Enterprise Pte Ltd.
    Inventor: Wo-Man Cheung
  • Patent number: D444807
    Type: Grant
    Filed: March 12, 1999
    Date of Patent: July 10, 2001
    Inventor: Wo Man Cheung