Patents by Inventor Ellwood David Nonnemacher

Ellwood David Nonnemacher 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).

  • Echo cancellation for a broadband distribution system
    Patent number: 6208833
    Abstract: A wideband signal distribution unit for receiving a plurality of inputs and having a plurality of outputs is provided. The distribution unit features a first combiner having an output and being connected to a first subset of the plurality of inputs. A second combiner having an output is connected to a second subset of the plurality of inputs. A phase shifting combiner having inputs each connected to the outputs of the first and second combiners supplies a combined signal to an output connected to a splitter which is connected to the plurality of signal distribution unit outputs. The phase shifting combiner is designed to apply a phase shift to one of its inputs.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: March 27, 2001
    Assignee: The Whitaker Corporation
    Inventors: Joseph Paul Preschutti, Ellwood David Nonnemacher, Jeff Legg