Patents by Inventor Farn-Juoh Chung

Farn-Juoh Chung 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).

  • Carpet tiles with edges projections and grooves
    Patent number: 4942072
    Abstract: A carpet includes at least two sets of square carpet tiles of different sizes. The carpet tiles of the carpet have a plurality of trapezoidal projections and complementary grooves so that the tiles may be interlocked with each other. One set of the carpet tiles has edges which are longer than those of the other set each of which is integrally proportional to an edge of the other set of carpet tiles. A special trapezoidal tooth and a complementary notch adjacent the tooth are provided at each longer edge of the carpet tiles and equally spaced from each other by one unit length, the unit length equalling the length of the edge of a tile from the other set of carpet tiles.
    Type: Grant
    Filed: May 11, 1989
    Date of Patent: July 17, 1990
    Inventor: Farn-Juoh Chung