Patents by Inventor Marc C. Keller

Marc C. Keller 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: 7451242
    Abstract: Systems and methods for providing network access using network controllers and network interfaces. A network controller has one or more subsystems including a monitoring system that monitors a plurality of communication paths to detect a presence of link pulses in one of the communication paths, a communication providing system that routs the available network signal to a first device, and a communication halting system that prevents the available network signal from being transmitted to one or more other devices. A network interface has a first circuit path routing a first network signal received at a first input of the network interface to a first device. Moreover, the network interface has a second circuit path routing a second network signal received at a second input of the network interface to a first output of the first network interface to be received at a first input of a second network interface.
    Type: Grant
    Filed: August 27, 2001
    Date of Patent: November 11, 2008
    Assignee: Xerox Corporation
    Inventors: Rui M. Amorin, Marc C. Keller, Robert S Westfall, James R York, Thomas Higgins
  • Publication number: 20030041148
    Abstract: Systems and methods for providing network access using network controllers and network interfaces. A network controller has one or more subsystems including a monitoring system that monitors a plurality of communication paths to detect a presence of link pulses in one of the communication paths, a communication providing system that routs the available network signal to a first device, and a communication halting system that prevents the available network signal from being transmitted to one or more other devices. A network interface has a first circuit path routing a first network signal received at a first input of the network interface to a first device. Moreover, the network interface has a second circuit path routing a second network signal received at a second input of the network interface to a first output of the first network interface to be received at a first input of a second network interface.
    Type: Application
    Filed: August 27, 2001
    Publication date: February 27, 2003
    Inventors: Rui M. Amorin, Marc C. Keller, Robert S. Westfall, James R. York, Thomas Higgins