Patents by Inventor Robert Tkach

Robert Tkach 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).

  • Patent number: 7805075
    Abstract: A method includes receiving a restoration indicator associated with a path that includes an optical cross-connect (OXC). The OXC is reconfigured from a standby configuration to a restoration configuration in response to the restoration indicator. An optical signal received in a first direction at a first wavelength is optically regenerated to produce an optical signal in the first direction at a second wavelength. An optical signal received in a second direction at the second wavelength is optically regenerated to produce an optical signal in the second direction at the first wavelength.
    Type: Grant
    Filed: April 27, 2009
    Date of Patent: September 28, 2010
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Angela Chiu, John L. Strand, Robert Tkach
  • Publication number: 20090208203
    Abstract: A method includes receiving a restoration indicator associated with a path that includes an optical cross-connect (OXC). The OXC is reconfigured from a standby configuration to a restoration configuration in response to the restoration indicator. An optical signal received in a first direction at a first wavelength is optically regenerated to produce an optical signal in the first direction at a second wavelength. An optical signal received in a second direction at the second wavelength is optically regenerated to produce an optical signal in the second direction at the first wavelength.
    Type: Application
    Filed: April 27, 2009
    Publication date: August 20, 2009
    Inventors: Angela Chiu, John L. Strand, Robert Tkach
  • Patent number: 7526198
    Abstract: A method includes receiving a restoration indicator associated with a path that includes an optical cross-connect (OXC). The OXC is reconfigured from a standby configuration to a restoration configuration in response to the restoration indicator. An optical signal received in a first direction at a first wavelength is optically regenerated to produce an optical signal in the first direction at a second wavelength. An optical signal received in a second direction at the second wavelength is optically regenerated to produce an optical signal in the second direction at the first wavelength.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: April 28, 2009
    Assignee: AT&T Corp.
    Inventors: Angela Chiu, John L. Strand, Robert Tkach