Patents by Inventor Wang S. Chang

Wang S. Chang 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).

  • Transmission mechanism for the adjustment of inclination angle of a venetian blind
    Patent number: 4869308
    Abstract: An improved transmission mechanism for the adjustment of the angle of the leaves of venetian blinds, comprising two gears, a cylindrical body, a bevel gear, a shifting means and a cord. It can selectively connect the adjusting rod to a first rotary beam which controls the inclination angle of the leaves of the upper half of the venetian blind or to a second rotary beam which controls those of the lower half of the venetian blind via a cord for controlling the shifting member. It is structurally compact and simple, thus greatly saving the cost of production.
    Type: Grant
    Filed: August 2, 1988
    Date of Patent: September 26, 1989
    Inventor: Wang S. Chang