Patents by Inventor Huang-Hsien Tsay

Huang-Hsien Tsay 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).

  • Light emitting writing apparatus
    Patent number: 4964024
    Abstract: A light emitting writing apparatus, which includes a cylinder in the pen-holder thereof for holding a dry battery, a holder plate in the pen-holder thereof for holding a lamp bulb and a plurality of writing elements, and a button slider positioned in a through-hole on the pen-holder thereof for controlling the connection of the positive end of the dry battery to its negative end through the lamp bulb so as to turn on the lamp bulb to produce light.
    Type: Grant
    Filed: January 26, 1990
    Date of Patent: October 16, 1990
    Inventor: Huang-Hsien Tsay