Patents by Inventor Thomas Holtzman Williams

Thomas Holtzman Williams 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).

  • Publication number: 20220239537
    Abstract: A method for transmitting a digital frame by an optical network unit in a digital communications network includes steps of arranging received data into a series of symbols, installing a primary cyclic prefix immediately preceding the series of symbols in time, and inserting individual ones of a plurality of secondary cyclic prefixes between each adjacent pair of symbols in the series of symbols. A length of each secondary cyclic prefix corresponds to a first duration shorter than an amount of time needed to turn on a laser of the optical network unit. The method further includes a step of providing to the optical network unit the digital frame. The digital frame includes the primary cyclic prefix, the plurality of secondary cyclic prefixes, and the series of symbols. The method further includes a step of modulating the provided digital frame by a laser of the optical network unit.
    Type: Application
    Filed: April 11, 2022
    Publication date: July 28, 2022
    Inventors: Douglas D. Jones, Luis Alberto Campos, Thomas Holtzman Williams
  • Patent number: 11364940
    Abstract: A railroad switch (in USA), turnout, or [set of] points (Europe) is a mechanical installation enabling railway trains to be guided from one track to another, such as at a railway junction or where a spur or siding branches off. This invention describes a rail transportation system that allows vehicles to change tracks at railroad switch locations while all supporting and guiding rails remain static. Vehicles have diverters that apply lateral force to direct the vehicle to go onto the desired track, right, left, or straight ahead. This is enabled by the diverters plus rail wheels that have inside flanges and wide cylindrical surfaces. This innovation allows rail vehicles to travel through a connected rail system like a highway system that is transporting trucks, buses, and cars on paved roads. This system may operate under a computerized traffic control system and allows mass transit systems to respond to ride requests, enabling 24-hour route-adaptive mass transit.
    Type: Grant
    Filed: August 28, 2021
    Date of Patent: June 21, 2022
    Inventor: Thomas Holtzman Williams
  • Patent number: 11362743
    Abstract: Systems and methods provide for a network test that by capturing in-phase values of a reflected signal off a transmission medium or irregularity therein. The in-phase values are converted to time-domain, which is then halved and converted back to the frequency domain to identify calculated quadrature values associated with the measured in-phase values. The measured in-phase values and calculated quadrature values may be used to determine impedance reflection/transmission characteristics of transmission medium or an irregularity therein. The measured in-phase values and calculated quadrature values may be used to determine if the transmission medium is minimum phase.
    Type: Grant
    Filed: August 24, 2021
    Date of Patent: June 14, 2022
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Thomas Holtzman Williams, Lin Cheng
  • Patent number: 11316715
    Abstract: A method for automatically identifying an impairment of a communication medium includes (1) obtaining a spectrum response of communication signals traveling through the communication medium, (2) converting the spectrum response from a frequency domain to a time domain, to generate an impulse response, and (3) identifying the impairment of the communication medium at least partially based on one or more characteristics of the impulse response.
    Type: Grant
    Filed: July 21, 2021
    Date of Patent: April 26, 2022
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Jason W. Rupe, Thomas Holtzman Williams, Lin Cheng, Jingjie Zhu
  • Patent number: 11303486
    Abstract: A method for transmitting a digital frame by an optical network unit in a digital communications network includes steps of arranging received data into a series of symbols, installing a primary cyclic prefix immediately preceding the series of symbols in time, and inserting individual ones of a plurality of secondary cyclic prefixes between each adjacent pair of symbols in the series of symbols. A length of each secondary cyclic prefix corresponds to a first duration shorter than an amount of time needed to turn on a laser of the optical network unit. The method further includes a step of providing to the optical network unit the digital frame. The digital frame includes the primary cyclic prefix, the plurality of secondary cyclic prefixes, and the series of symbols. The method further includes a step of modulating the provided digital frame by a laser of the optical network unit.
    Type: Grant
    Filed: March 2, 2020
    Date of Patent: April 12, 2022
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Douglas D. Jones, Luis Alberto Campos, Thomas Holtzman Williams
  • Patent number: 11230813
    Abstract: A track system for transporting people and goods with two support rails plus a side stabilizer mechanism associated with one or both rails. The side stabilizer is employed to provide lateral stability and keep a vehicle's rail wheels on the support rails. The side stabilizer may be a protruding bar or a recessed groove. This track system enables vehicles to change support rails at a junction with stationary non-switching rails. Rail wheels roll over the support rails and support the weight of the vehicle while on the rails. Interior side rollers contact the interior of the bar side stabilizer and maintain the vehicle's rail wheels centered over the support rails. Exterior side rollers contact an exterior of one of the bar side stabilizers and forces the vehicle to stay on the current track or to change to a different track. Recessed grooves and dual-flange wheels can alternately provide side stabilization.
    Type: Grant
    Filed: October 16, 2020
    Date of Patent: January 25, 2022
    Inventor: Thomas Holtzman Williams
  • Publication number: 20210399936
    Abstract: A method of modulating a series of input digital symbols of a first modulation scheme is provided. The method is implemented by a transmitter and includes receiving a sequential series of samples of the digital symbols in a first domain of the first modulation scheme. The first domain is one of the time domain and the frequency domain. The method further includes determining a dual of the first modulation scheme. The dual has a second modulation scheme in a second domain that is different from the first domain the second domain is the other of the time domain and the frequency domain. The method further includes applying a 90 degree rotational operation to the second modulation scheme to generate a rotational modulation format, modulating the series of digital symbols with the generated rotational modulation format, and outputting the modulated series of digital symbols to a receiver.
    Type: Application
    Filed: August 23, 2021
    Publication date: December 23, 2021
    Inventors: Thomas Holtzman Williams, Lin Cheng
  • Patent number: 11159250
    Abstract: A transmitter is configured to transmit data to a receiver over a communications network. The transmitter includes a memory for storing computer-executable instructions and a processor in operable communication with the memory. The processor is configured to (i) collect spectrum data of a spectral band over a first sampling interval, and (ii) store the collected spectrum data in the memory. The transmitter further includes a common path distortion (CPD) detection unit configured to (i) sample the collected spectrum data, over a second sampling interval less than the first sampling interval, for a plurality of sub-bands within the spectral band, (ii) analyze the spectral band and each sub-band for indications of common path distortion, and (iii) inject a test signal configured for detection at a headend of the communications network. The transmitter further includes a modem portion configured to operably communicate with the headend and the receiver.
    Type: Grant
    Filed: April 15, 2019
    Date of Patent: October 26, 2021
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Thomas Holtzman Williams, Luis Alberto Campos, Jason W. Rupe
  • Patent number: 11102043
    Abstract: A method of modulating a series of input digital symbols of a first modulation scheme is provided. The method is implemented by a transmitter and includes receiving a sequential series of samples of the digital symbols in a first domain of the first modulation scheme. The first domain is one of the time domain and the frequency domain. The method further includes determining a dual of the first modulation scheme. The dual has a second modulation scheme in a second domain that is different from the first domain the second domain is the other of the time domain and the frequency domain. The method further includes applying a 90 degree rotational operation to the second modulation scheme to generate a rotational modulation format, modulating the series of digital symbols with the generated rotational modulation format, and outputting the modulated series of digital symbols to a receiver.
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: August 24, 2021
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Thomas Holtzman Williams, Lin Cheng
  • Publication number: 20210237526
    Abstract: Described is a multi-mode transportation system with roads and monorails, and vehicles that can transform to travel on either roads, or monorails, or on both simultaneously. Vehicles move in mode 1 on the roads using road wheels that roll over pavement. Vehicles in mode 2 move on the monorails and are supported by rail wheels in contact with a top of a monorail. In mode 2, the vehicle is supported by side cylinders that stabilize the vehicle on the monorail. Vehicles move in mode 3 with support from both roads and monorails simultaneously. Monorail mount locations simplify the vehicle's transition between modes. Pivoting or other mechanisms for road wheels, rail wheels, or side cylinders facilitate vehicle design. The vehicle can optionally be connected to the Internet, and be part of a traffic control system or operate autonomously. Small scale models or computer models of these vehicle can be used as toys, for product development, prototyping, animation, competitive games, entertainment, or for education.
    Type: Application
    Filed: February 3, 2020
    Publication date: August 5, 2021
    Inventor: Thomas Holtzman Williams
  • Patent number: 11057006
    Abstract: An amplification subsystem for a communication system includes a downstream amplifier configured to transmit a downstream signal within a first frequency range, an upstream amplifier configured to transmit an upstream signal within a second frequency range, and a bidirectional amplifier configured to selectively transmit a mid-band signal in either of the upstream and downstream direction.
    Type: Grant
    Filed: May 18, 2020
    Date of Patent: July 6, 2021
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Thomas Holtzman Williams, Belal Hamzeh
  • Patent number: 11025297
    Abstract: Facilitating echo cancellation within communication networks is contemplated, such as but not necessarily limited to facilitating echo cancellation within full-duplex (FDX) communication networks. The echo cancellation may optionally be performed with an echo canceller included as part of or otherwise associated with an FDX node used to facilitate interfacing signaling between a digital domain and an analog domain of a FDX or other communication network.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: June 1, 2021
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Thomas Holtzman Williams, Belal Hamzeh, Luis Alberto Campos
  • Publication number: 20210153496
    Abstract: A week killing device where weeds or other undesirable vegetation are killed by radio frequency (RF) energy applied directly to the weed by a probe inserted into or near the weed. The probe is comprised of a center pin, which is electrically hot, surrounded by periphery pins which are grounded. A reflection measuring circuit makes an impedance measurement of the probe in the ground and a matching circuit is adjusted to make an impedance match. Next a RF generator applies RF energy through the matching circuit into the probe. Energy delivery is monitored to insure weed kill by thermal heating. The probe can be manually applied by a person or applied by an autonomous vehicle using computer vision (CV) and artificial intelligence (AI) to identify weeds and avoid row crops. The weed killing device may apply power to the above-ground portion a of a weed with the root providing a ground return. The weed killing device may be towed and apply RF energy when a weed is detected by the impedance measurement circuit.
    Type: Application
    Filed: November 26, 2019
    Publication date: May 27, 2021
    Inventor: Thomas Holtzman Williams
  • Patent number: 10985832
    Abstract: Mitigation of satellite interference is contemplated. The mitigation may include processing satellite transmissions to remove interferences based on an amount of signal overlap, such as to facilitate mitigating interferences resulting from satellite spacing and/or ground antenna dish size.
    Type: Grant
    Filed: February 3, 2020
    Date of Patent: April 20, 2021
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Thomas Holtzman Williams, David Daniel Smith
  • Patent number: 10921363
    Abstract: A system for detecting a failure along a transmission line of a cable plant is provided. The system includes a mobile vehicle configured to travel along a pathway substantially proximate to the cable plant along a span of the transmission line, and a transmitter disposed with the mobile vehicle. The transmitter is configured to emit (i) a test signal capable of ingressing the transmission line at a location of the failure, and (ii) an information signal containing location and velocity data of the mobile vehicle. The test signal is configured to provide phase shift and Doppler frequency information to a receiver operably connected to the transmission line at a location upstream from the location of the failure.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: February 16, 2021
    Assignee: Cable Television Laboratories, Inc.
    Inventor: Thomas Holtzman Williams
  • Publication number: 20200412393
    Abstract: Mitigating noise in a network is contemplated, such as but not necessarily limited to mitigating noise through a detection process whereby noise deviations resulting from selectively controlling smart taps, switches or other devices to block signaling in the network may be used to locate sources of noise.
    Type: Application
    Filed: September 14, 2020
    Publication date: December 31, 2020
    Inventors: JOSEPH PADDEN, THOMAS HOLTZMAN WILLIAMS, JONATHAN RAY DENNIS, DARYL WILLIAM MALAS, DAN SCHRIMPSHER, DOUGLAS D. JONES
  • Patent number: 10778266
    Abstract: Mitigating noise in a network is contemplated, such as but not necessarily limited to mitigating noise through a detection process whereby noise deviations resulting from selectively controlling smart taps, switches or other devices to block signaling in the network may be used to locate sources of noise.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: September 15, 2020
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Joseph Padden, Thomas Holtzman Williams, Jonathan Ray Dennis, Daryl William Malas, Dan Schrimpsher, Douglas D. Jones
  • Publication number: 20200280289
    Abstract: An amplification subsystem for a communication system includes a downstream amplifier configured to transmit a downstream signal within a first frequency range, an upstream amplifier configured to transmit an upstream signal within a second frequency range, and a bidirectional amplifier configured to selectively transmit a mid-band signal in either of the upstream and downstream direction.
    Type: Application
    Filed: May 18, 2020
    Publication date: September 3, 2020
    Inventors: Thomas Holtzman Williams, Belal Hamzeh
  • Publication number: 20200266896
    Abstract: A communication network includes a first electrical cable, a home network translation device, and a first termination device. The home network translation device is communicatively coupled between an optical cable and the first electrical cable, and the home network translation device is configured to translate data between an optical protocol on the optical cable and a home networking protocol on the first electrical cable. The first termination device is communicatively coupled to the first electrical cable and is configured to translate data between the home networking protocol on the first electrical cable and an additional protocol on an additional communication medium communicatively coupled to the first termination device.
    Type: Application
    Filed: May 4, 2020
    Publication date: August 20, 2020
    Inventor: Thomas Holtzman Williams
  • Publication number: 20200204416
    Abstract: A method for transmitting a digital frame by an optical network unit in a digital communications network includes steps of arranging received data into a series of symbols, installing a primary cyclic prefix immediately preceding the series of symbols in time, and inserting individual ones of a plurality of secondary cyclic prefixes between each adjacent pair of symbols in the series of symbols. A length of each secondary cyclic prefix corresponds to a first duration shorter than an amount of time needed to turn on a laser of the optical network unit. The method further includes a step of providing to the optical network unit the digital frame. The digital frame includes the primary cyclic prefix, the plurality of secondary cyclic prefixes, and the series of symbols. The method further includes a step of modulating the provided digital frame by a laser of the optical network unit.
    Type: Application
    Filed: March 2, 2020
    Publication date: June 25, 2020
    Inventors: Douglas D. Jones, Luis Alberto Campos, Thomas Holtzman Williams