Patents by Inventor Charles W. Richards, IV

Charles W. Richards, IV 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: 10142018
    Abstract: A solid-state lighting fixture includes a first group of solid-state light elements, a second group of solid-state light elements, and a light control module. The first group of solid-state light elements is configured to emit visible light at a first wavelength. The second group of solid-state light elements is configured to emit light at a second wavelength, which is different from the first wavelength. The light control module is configured to modulate the light emitted from the first group of solid-state light elements and modulate the light emitted from the second group of solid-state light elements, respectively, such that the modulation pattern of the emitted light from each one of the first group of solid-state light elements and the second group of solid-state light elements communicates a first subset of data and a second subset of data, respectively, while being undetectable to the human eye.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: November 27, 2018
    Assignee: Cree, Inc.
    Inventor: Charles W. Richards, IV
  • Patent number: 9980356
    Abstract: a lighting fixture includes a power input configured to be coupled to a power source, a power output configured to be coupled to an external load and a lighting device, such as a light emitting diode (LED) device, coupled to the power input and configured to provide illumination. The lighting fixture further includes a protection circuit coupled between the power input and the power output and configured to detect a condition of a power source coupled to the power input and to control power transmission between the power input and the power output responsive to the detected condition. The power output may be configured to support daisy-chain connection of the lighting fixture to at least one other lighting fixture, and the protection circuit may be configured to control power transmission to the at least one other lighting fixture responsive to the detected condition.
    Type: Grant
    Filed: January 4, 2013
    Date of Patent: May 22, 2018
    Assignee: CREE, INC.
    Inventors: Joshua J. Markle, Dao Dinh, Edward Steinke, Charles W. Richards, IV
  • Patent number: 9841490
    Abstract: A system and method are provided for detecting direction of movement. The system includes at least two radio frequency identification (RFID) readers arranged in different locations. The RFID readers transmit respective location signals from their locations and receive corresponding response signals from a portable electronic device (PED) when the PED is within range to receive the corresponding location signals, respectively. The system includes a controller configured to determine whether the individual response signals received by the RFID readers respectively satisfy a predetermined condition at a first time and a second time subsequent to the first time. The controller is also configured to determine a direction of movement of the portable electronic device relative to the locations of the RFID readers during the first and second times based on whether the response signals respectively satisfy the predetermined condition at the first and second times.
    Type: Grant
    Filed: January 17, 2017
    Date of Patent: December 12, 2017
    Assignee: BOOZ ALLEN HAMILTON INC.
    Inventors: John C. Swartz, Anthony Hefner, Charles W. Richards, IV, Gary Jason Myers, Matthias Welsh
  • Publication number: 20140255038
    Abstract: A solid-state lighting fixture includes a first group of solid-state light elements, a second group of solid-state light elements, and a light control module. The first group of solid-state light elements is configured to emit visible light at a first wavelength. The second group of solid-state light elements is configured to emit light at a second wavelength, which is different from the first wavelength. The light control module is configured to modulate the light emitted from the first group of solid-state light elements and modulate the light emitted from the second group of solid-state light elements, respectively, such that the modulation pattern of the emitted light from each one of the first group of solid-state light elements and the second group of solid-state light elements communicates a first subset of data and a second subset of data, respectively, while being undetectable to the human eye.
    Type: Application
    Filed: March 6, 2014
    Publication date: September 11, 2014
    Applicant: Cree, Inc.
    Inventor: Charles W. Richards, IV
  • Patent number: 4932070
    Abstract: Accurate tuning of a satellite system's burst demodulator to a signal which is subject to frequency offset in the course of its transmission over the satellite link is achieved without the use of high precision oscillators at remote sites, or the transmission of a dedicated pilot tone. Instead, a dedicated high precision clock is used for the purpose of establishing both the outlink carrier and the return channel carrier. The modulation of the data on the outlink carrier is also derived from the precision clock source. At each remote station, the outlink channel is monitored to recover the high precision clock. This recovered clock is then used as a reference for generating the return channel carrier. The burst demodulator equipment at the master station monitors both the outlink channel continuous carrier and burst mode transmissions from the remote stations.
    Type: Grant
    Filed: August 22, 1988
    Date of Patent: June 5, 1990
    Assignee: Scientific Atlanta
    Inventors: George W. Waters, Charles R. Burr, Charles W. Richards, IV