Patents by Inventor Frank Tsao

Frank Tsao 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).

  • Publication number: 20020172042
    Abstract: A night lighting fixture comprising a junction box including at least one front plate, within said junction box an electrical light source and light reflector, said fixture including a visible light detecting photocell, a first opening in said front plate for allowing external ambient light to reach said photocell, said photocell and light source being in electrical communication whereby said photocell is adapted to turn said light source off when the photocell detects ambient light and on when the photocell does not detect ambient light and another opening in said front plate to allow for the passage of light from said electrical light source to provide illumination in the external space.
    Type: Application
    Filed: August 6, 2001
    Publication date: November 21, 2002
    Inventor: Frank Tsao Wen-Chung
  • Publication number: 20020109995
    Abstract: A work light cage attachment system which includes a cage that securely attaches over the glass opening on a work light. The cage includes opposite top and bottom frame members and opposite side frame members. Attached to the corners of the top and bottom frame members are rearward extending legs. Each extending leg includes a perpendicularly aligned foot that, during assembly, is placed inside the gap between the edge of the faceplate and the glass and extends outward to prevent disengagement of the cage from the faceplate. Attached to each foot on the top and bottom frame members is a C-shaped clip which engages a raised lip formed on the inside surface of the faceplate. The lips prevent the cage from being removed from the work light without a tool, thus meeting United Laboratories code.
    Type: Application
    Filed: February 6, 2002
    Publication date: August 15, 2002
    Inventor: Frank Tsao
  • Patent number: 6062703
    Abstract: A multi-purpose working light includes a body portion having a first end provided with a plurality of fluorescent lamps and a second end formed with a notch thereby forming two lugs, each of the lugs having an outer side with a first circular recess and a center hole and an inner side with a plurality of first radial raised lines, a dog having two opposite sides each provided with a plurality of second radial raised lines and fitted in the notch, the dog having a threaded hole having a center line perpendicular to an axis going through the two opposite sides, a protective cap threadedly engaged with the body portion, and a lampshade fitted over the protective cap and threadedly engaged with the protective cap.
    Type: Grant
    Filed: March 16, 1999
    Date of Patent: May 16, 2000
    Assignee: Caster Lighting Inc.
    Inventor: Frank Tsao
  • Patent number: D449398
    Type: Grant
    Filed: October 25, 2000
    Date of Patent: October 16, 2001
    Inventor: Frank Tsao
  • Patent number: D345025
    Type: Grant
    Filed: May 20, 1992
    Date of Patent: March 8, 1994
    Assignee: Caster Lighting, Inc.
    Inventor: Frank Tsao
  • Patent number: D345226
    Type: Grant
    Filed: June 25, 1992
    Date of Patent: March 15, 1994
    Assignee: Caster Lighting Inc.
    Inventor: Frank Tsao
  • Patent number: D376892
    Type: Grant
    Filed: August 8, 1995
    Date of Patent: December 24, 1996
    Inventor: Frank Tsao