Patents by Inventor Keith Chappell

Keith Chappell 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: 11621884
    Abstract: A test instrument connectable to a cable television (CATV) network to provide a high resolution time domain reflectometry (TDR) in a fault location measurement is disclosed. The test instrument may have a port connectable to a test point in the CATV network. The test instrument may also have a processing circuit to perform a calibration measurement and a fault location measurement by transmitting frequency-chirped probe pulses into a closed calibration circuit within the test instrument, and receiving return signals at an analog-digital converter in the test instrument. The processing circuit may resample the calibration measurement and the fault location measurement at a high sampling rate, cross-correlate the fault location with the calibration measurement to generate a cross-correlation TDR waveform, and generate a new TDR waveform using a refinement processing technique to remove echoes from the cross-correlation TDR waveform.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: April 4, 2023
    Assignee: VIAVI SOLUTIONS INC.
    Inventors: Daniel Keith Chappell, Loren Eggert
  • Patent number: 10560729
    Abstract: A network test instrument is operable to generate an interference profile for a bursty channel of a cable television network. Frequency spectrum data of a received signal is cross-correlated with predetermined frequency spectrum data to identify traces representative of noise. The interference profile may be built from the traces.
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: February 11, 2020
    Assignee: VIAVI SOLUTIONS INC.
    Inventors: Cinna Soltanpur, Vincent Michael Zipparo, Daniel Keith Chappel
  • Publication number: 20190342593
    Abstract: A network test instrument is operable to generate an interference profile for a bursty channel of a cable television network. Frequency spectrum data of a received signal is cross-correlated with predetermined frequency spectrum data to identify traces representative of noise. The interference profile may be built from the traces.
    Type: Application
    Filed: May 21, 2019
    Publication date: November 7, 2019
    Applicant: VIAVI SOLUTIONS INC.
    Inventors: Cinna Soltanpur, Vincent Michael Zipparo, Daniel Keith Chappell
  • Patent number: 10321169
    Abstract: A network test instrument is operable to generate an interference profile for a bursty channel of a cable television network. Frequency spectrum data of a received signal is cross-correlated with predetermined frequency spectrum data to identify traces representative of noise. The interference profile may be built from the traces.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: June 11, 2019
    Assignee: VIAVI SOLUTIONS INC.
    Inventors: Cinna Soltanpur, Vincent Michael Zipparo, Daniel Keith Chappell
  • Publication number: 20190174162
    Abstract: A network test instrument is operable to generate an interference profile for a bursty channel of a cable television network. Frequency spectrum data of a received signal is cross-correlated with predetermined frequency spectrum data to identify traces representative of noise. The interference profile may be built from the traces.
    Type: Application
    Filed: December 1, 2017
    Publication date: June 6, 2019
    Applicant: VIAVI SOLUTIONS INC.
    Inventors: Cinna SOLTANPUR, Vincent Michael Zipparo, Daniel Keith Chappell
  • Patent number: 8206817
    Abstract: A window or door flashing or roofing material, containing no asphalt, either mechanically fastened or self-adhering comprising a mixture of: one or more ethylene based elastomers having a melting point below 160° F., in an amount of 10-40% based on the total weight of the product; one or more semi-crystalline, non-elastomer alpha olefin-based polymers having a melting point above 160° F. in an amount of about 10-40% based on the total weight of the product; and a rubber fraction of ground, vulcanized rubber having a size up to about 18 mesh, US Sieve Series, in an amount of about 10% to about 75%, based on the total weight of the product.
    Type: Grant
    Filed: June 10, 2009
    Date of Patent: June 26, 2012
    Inventors: Michael Donovan, Jason M. Logsdon, Keith Chappell
  • Publication number: 20100314026
    Abstract: A window or door flashing or roofing material, containing no asphalt, either mechanically fastened or self-adhering comprising a mixture of: one or more ethylene based elastomers having a melting point below 160° F., in an amount of 10-40% based on the total weight of the product; one or more semi-crystalline, non-elastomer alpha olefin-based polymers having a melting point above 160° F. in an amount of about 10-40% based on the total weight of the product; and a rubber fraction of ground, vulcanized rubber having a size up to about 18 mesh, US Sieve Series, in an amount of about 10% to about 75%, based on the total weight of the product.
    Type: Application
    Filed: June 10, 2009
    Publication date: December 16, 2010
    Applicant: AMCOL INTERNATIONAL CORPORATION
    Inventors: Michael Donovan, Jason M. Logsdon, Keith Chappell