Patents by Inventor Wah S. Kwong

Wah S. Kwong 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).

  • Differential relay for protecting an electrical power transmission system
    Patent number: 4760487
    Abstract: A differential relay includes two apparatus each associated with a different monitoring point on the line being protected by the relay. Each apparatus includes means for deriving digital data representative of the current monitored at the respective point, at time intervals defined by a clock within the apparatus. The two points are linked by a digital data communication channel, and information transmitted between the two points is used to compute digital data for the two points at substantially the same time, from digital data derived at different instants at the two points.
    Type: Grant
    Filed: April 9, 1986
    Date of Patent: July 26, 1988
    Assignee: The General Electric Company p.l.c.
    Inventors: Wah S. Kwong, Adrian O. Newbould