Patents by Inventor John Mark Ritchey

John Mark Ritchey 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).

  • Method for preventing lasing in an optical ring network
    Patent number: 6937823
    Abstract: Lasing of an optical channel at a particular wavelength is substantially prevented in an optical ring network by automatically verifying the presence of a break, e.g., termination, in the ring for an optical channel of a particular wavelength before allowing a node in the network to establish a “pass through” connection for that optical channel. More specifically, a node attempting to establish a “pass through” route for an optical channel received from another node is prevented from establishing the necessary connections to do so until it is confirmed that the optical channel of interest has been added to the ring or dropped from the ring at another node, thus indicating the presence of a “break” in the optical ring for that optical channel of interest.
    Type: Grant
    Filed: March 5, 2001
    Date of Patent: August 30, 2005
    Assignee: Lucent Technologies Inc.
    Inventors: John G Israel, Gerard Lingner, III, John Mark Ritchey, Singanallur R. Thangavelu, William A Thompson
  • Method for preventing lasing in an optical ring network
    Publication number: 20020131098
    Abstract: Lasing of an optical channel at a particular wavelength is substantially prevented in an optical ring network by automatically verifying the presence of a break, e.g., termination, in the ring for an optical channel of a particular wavelength before allowing a node in the network to establish a “pass through” connection for that optical channel. More specifically, a node attempting to establish a “pass through” route for an optical channel received from another node is prevented from establishing the necessary connections to do so until it is confirmed that the optical channel of interest has been added to the ring or dropped from the ring at another node, thus indicating the presence of a “break” in the optical ring for that optical channel of interest.
    Type: Application
    Filed: March 5, 2001
    Publication date: September 19, 2002
    Inventors: John G. Israel, Gerard Lingner, John Mark Ritchey, S. R. Thangavelu, William A. Thompson