Patents by Inventor David S. Burwell

David S. Burwell 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).

  • Protective circuit for providing a reference voltage at a backplane
    Patent number: 5130636
    Abstract: A self-correcting protective circuit for providing a reference voltage to a backplane bus wherein the circuit includes a primary transistor, current sensing resistor and diode connected between a supply voltage and the backplane. The combination of a current-limiting resistor and a control transistor is used to sense current flow to the board through the primary transistor and limit same when the backplane bus voltage fluctuates.
    Type: Grant
    Filed: February 12, 1991
    Date of Patent: July 14, 1992
    Assignee: Raynet Corp.
    Inventors: Ashok Kumar, David S. Burwell