Patents by Inventor Chih H. Pan

Chih H. Pan 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).

  • Projection clock
    Patent number: 5247492
    Abstract: A projection clock and in particular to one including a housing, the housing being provided at one end with a light bulb and a converging lens in alignment with the light bulb, and at the other end with a clock having a reflective dial with laterally inverted figures marking hours, and a cover engaged with the housing and having a diverging lens in alignment with the reflective dial of the clock and a converging member aligned with the light bulb.
    Type: Grant
    Filed: October 13, 1992
    Date of Patent: September 21, 1993
    Inventor: Chih H. Pan
  • Projection clock
    Patent number: D355607
    Type: Grant
    Filed: October 13, 1992
    Date of Patent: February 21, 1995
    Inventor: Chih H. Pan