Patents by Inventor Steve A. Ristau

Steve A. Ristau 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).

  • Non-intrusive DWDM billing system
    Patent number: 6374307
    Abstract: A billing system comprises an optical system that uses a variable magnification mirror to split-off a sample of the DWDM-carrier through traffic. A pair of wedge-filters are alternatively included to add/drop particular carriers according to their respective wavelengths. The selected carrier sample is then processed through a CISCO 12000 gigabit switch router such that billing information is output that is useful to an optical Internet backbone carrier.
    Type: Grant
    Filed: February 12, 1999
    Date of Patent: April 16, 2002
    Inventors: Steve A. Ristau, Richard Brewster Main