Patents by Inventor Ching-Shyn Tsai

Ching-Shyn Tsai 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).

  • Electric timer with a projector
    Patent number: 5260919
    Abstract: An electric timer with a projector comprising a common electric timer, a vaccum fluorescent display connected with the timer to display time, and a projector including a speculum and a convex lens, the speculum reflecting the time displayed in the vaccum fluorescent display, the convex lens magnifying and projecting the reflected time on a ceiling or a wall to be easily seen.
    Type: Grant
    Filed: May 8, 1992
    Date of Patent: November 9, 1993
    Inventor: Ching-Shyn Tsai