Patents by Inventor David W. Langford

David W. Langford 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: 9550970
    Abstract: Culture systems, devices and related methods and articles may automate the culturing or incubation process according to defined culturing protocols. Such may employ removable multi-well growth cassette. Wells may be subdivided into subwells. Such may employ removable media and waste cartridges and/or gas canisters to supply consumables, which may be supplied in kits, for example with processor executable culturing protocols. Direct fluidic coupling between growth cassettes and the removable cartridges or canisters may be employed. Operational and/or environmental conditions may be sensed or monitored, and may be used to adjust or alter operation. A microscopy subsystem may capture images which may be stored and/or analyzed. Analysis may be used to adjust or alter operation.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: January 24, 2017
    Assignee: INQ BIOSCIENCES CORPORATION
    Inventors: Aaron Hammons, Micah B. Harvey, David W. Langford, Joseph McGinty, Steven M. Faes, Christopher D. Pittman
  • Publication number: 20110207209
    Abstract: Culture systems, devices and related methods and articles may automate the culturing or incubation process according to defined culturing protocols. Such may employ removable multi-well growth cassette. Wells may be subdivided into subwells. Such may employ removable media and waste cartridges and/or gas canisters to supply consumables, which may be supplied in kits, for example with processor executable culturing protocols. Direct fluidic coupling between growth cassettes and the removable cartridges or canisters may be employed. Operational and/or environmental conditions may be sensed or monitored, and may be used to adjust or alter operation. A microscopy subsystem may capture images which may be stored and/or analyzed. Analysis may be used to adjust or alter operation.
    Type: Application
    Filed: February 17, 2011
    Publication date: August 25, 2011
    Inventors: Aaron Hammons, Micah B. Harvey, David W. Langford, Joseph McGinty, Steven M. Faes, Christopher D. Pittman
  • Patent number: 7230980
    Abstract: A method for calibrating an impulse radio distance measuring system comprising an impulse radio transceiver by conducting a pulse through a transmit receive switch to an antenna, receiving return energy which has been discharged across the transmit receive switch, determining a time of arrival of the return energy. The return energy is comprised of two distinct pulses, one of which represents discharge of the transmit switch as the original pulse travels to the antenna, the second represents energy reflected from the antenna and again discharged across the transmit receive switch while the switch is in the transmit position. The timing of the un-reflected energy is determined then the timing of the reflected energy relative to the un-reflected energy is determined through auto-correlation of the time domain scan of the received composite waveforms.
    Type: Grant
    Filed: September 17, 2002
    Date of Patent: June 12, 2007
    Assignee: Time Domain Corporation
    Inventors: David W. Langford, Dennis L. Troutman
  • Patent number: 6760387
    Abstract: A system and method for determining angular offset of an impulse radio transmitter using an impulse radio receiver coupled to two antennae. The antennae are separated by some known distance, and, in one embodiment, one antennae is coupled to the radio with cable delay. Impulse signals from the antennae are measured to determine the time difference of arrival of one such signal received by one antenna compared to that of the other antenna. Time differential is measured by autocorrelation of the entire impulse radio scan period, by detecting the leading edges of both incoming signals or various combinations of these methods. Using a tracking receiver, the pulses may be continuously tracked thus providing real time position information.
    Type: Grant
    Filed: September 21, 2001
    Date of Patent: July 6, 2004
    Assignee: Time Domain Corp.
    Inventors: David W. Langford, Michael J. Nieburg, Gregory A. Shreve
  • Publication number: 20030076879
    Abstract: A method for calibrating an impulse radio distance measuring system comprising an impulse radio transceiver by conducting a pulse through a transmit receive switch to an antenna, receiving return energy which has been discharged across the transmit receive switch, determining a time of arrival of the return energy. The return energy is comprised of two distinct pulses, one of which represents discharge of the transmit switch as the original pulse travels to the antenna, the second represents energy reflected from the antenna and again discharged across the transmit receive switch while the switch is in the transmit position. The timing of the un-reflected energy is determined then the timing of the reflected energy relative to the un-reflected energy is determined through auto-correlation of the time domain scan of the received composite waveforms.
    Type: Application
    Filed: September 17, 2002
    Publication date: April 24, 2003
    Inventors: David W. Langford, Dennis L. Troutman
  • Publication number: 20030058971
    Abstract: A system and method for determining angular offset of an impulse radio transmitter using an impulse radio receiver coupled to two antennae. The antennae are separated by some known distance, and, in one embodiment, one antennae is coupled to the radio with cable delay. Impulse signals from the antennae are measured to determine the time difference of arrival of one such signal received by one antenna compared to that of the other antenna. Time differential is measured by autocorrelation of the entire impulse radio scan period, by detecting the leading edges of both incoming signals or various combinations of these methods. Using a tracking receiver, the pulses may be continuously tracked thus providing real time position information.
    Type: Application
    Filed: September 21, 2001
    Publication date: March 27, 2003
    Inventors: David W. Langford, Michael J. Nieburg, Gregory A. Shreve