Patents by Inventor Chuk Wally Seto

Chuk Wally Seto 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).

  • Standby high voltage analog line feed
    Patent number: 5889858
    Abstract: A standby feed circuit for a subscriber line comprising a constant current power feeding circuit for a subscriber line for supplying a voltage to a subscriber line at a voltage less than a standard central office power feeding circuit, a voltage source for providing the standard voltage, apparatus for applying the standard voltage when a station apparatus connected to the subscriber line is in an on-hook condition, and apparatus for applying said voltage less than the standard voltage in place of the standard voltage when the station apparatus is in an off-hook condition.
    Type: Grant
    Filed: July 3, 1996
    Date of Patent: March 30, 1999
    Assignee: Mitel Corporation
    Inventors: Edward P. Gancarcik, Chuk Wally Seto