Patents by Inventor James Warden

James Warden 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: 10322688
    Abstract: A battery management system (BMS) controls lithium battery access on a utility vehicle. The BMS includes a battery interface that couples with a lithium battery, a load interface that couples with a set of loads of the utility vehicle, and control circuitry coupled with the battery interface and the load interface. The control circuitry mechanically disconnects the battery interface from the load interface in response to a sleep event. Additionally, after the battery interface is mechanically disconnected from the load interface, the control circuitry mechanically reconnects the battery interface to the load interface in response to a wakeup event. Furthermore, after the battery interface is mechanically reconnected to the load interface, the control circuitry maintains connection between the battery interface and the load interface to convey power from the lithium battery to the set of loads of the utility vehicle through the battery interface and the load interface.
    Type: Grant
    Filed: December 30, 2016
    Date of Patent: June 18, 2019
    Assignee: Textron Innovations Inc.
    Inventors: Arthur James Harvey, Norman R. Padgett, John Ledden, Robert Charles Bradley, Patrick Dwaine Warden
  • Patent number: 9748668
    Abstract: A diversity antenna module comprising a first radiating element adapted to operate with a first transceiver circuit operating in at least one band and a second radiating element adapted to operate with a second transceiver circuit operating in at least one band. The first radiating element is disposed along a first side of a substrate and the second radiating element is disposed along a second side of the substrate, wherein the first and second sides are substantially perpendicular to each other, the first and second radiating elements being spatially dispersed from each another by a distance.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: August 29, 2017
    Assignee: BlackBerry Limited
    Inventors: Dong Wang, Qinjiang Rao, James Warden
  • Patent number: 9680217
    Abstract: Real-time calibration of a tunable matching network that matches the dynamic impedance of an antenna in a radio frequency receiver system. The radio frequency receiver system includes two non-linear equations that may be solved to determine the reflection coefficient of the antenna. The tunable matching network is repeatedly perturbed and the power received by the antenna is measured after each perturbation at the same node in the matching network. The measured power values are used by an optimizer in converging to a solution that provides the reflection coefficient of the antenna. The reflection coefficient of the antenna may be used to determine the input impedance of the antenna. The elements of the matching circuit are then adjusted to match the input impedance of the antenna.
    Type: Grant
    Filed: April 2, 2014
    Date of Patent: June 13, 2017
    Assignee: BlackBerry Limited
    Inventors: Shirook M. Ali, James Warden, Mohamed Bakr
  • Patent number: 9634395
    Abstract: Embodiments are directed to a balun structure comprising: a monopole antenna, and a microstrip coupled to the monopole antenna and comprising a ground plane modified to include at least two arms. Embodiments are directed to a balun structure comprising: a monopole antenna, and a microstrip coupled to the monopole antenna using a stepwise tapered microstrip feed.
    Type: Grant
    Filed: April 26, 2013
    Date of Patent: April 25, 2017
    Assignee: BlackBerry Limited
    Inventors: Houssam Kanj, Huanhuan Gu, Christopher DeVries, James Warden
  • Patent number: 9342677
    Abstract: An authentication method, system and device are provided to continuously collect dynamic personal identification data (DPID) samples through a user device by using one or more sensors to continuously collect biometric and location data samples associated with the user and then securely transfer the DPID samples to a central authentication server where attributes of the DPID samples may be captured and incorporated as part of a challenge-response pair which requests an arbitrarily generated N-tuple of the DPID samples from a predetermined time interval from the user device that is unique to the user and dynamic based on the sensed data and the time-interval of collection.
    Type: Grant
    Filed: August 4, 2010
    Date of Patent: May 17, 2016
    Assignee: BlackBerry Limited
    Inventors: Shirook M. Ali, Christopher Labrador, James Warden, Kelce S. Wilson
  • Patent number: 9325355
    Abstract: A system that incorporates teachings of the subject disclosure may include, for example, determining a first voltage standing wave ratio (VSWR), selecting a VSWR circle from among a group of VSWR circles based on the first VSWR, identifying a group of sets of tuning settings for variable reactance elements of a matching network of the communication device where the identifying of the group of sets of tuning settings is based on each set of tuning settings of the group of sets of tuning settings being associated with the VSWR circle, and selecting a set of tuning settings from among the group of sets of tuning settings responsive to a second VSWR determined for the set of tuning settings satisfying a VSWR threshold. Other embodiments are disclosed.
    Type: Grant
    Filed: February 14, 2013
    Date of Patent: April 26, 2016
    Assignee: BLACKBERRY LIMITED
    Inventors: Mark Pecen, James Warden, Shirook M. Ali, Amir Danak
  • Patent number: 9203500
    Abstract: A system that incorporates teachings of the subject disclosure may include, for example, identifying a usage mode of the communication device, running a calibration session that includes adjusting a starting point for tuning of the matching network based on a categorized history of previous tuning search paths and based on the usage mode where the categorized history of previous tuning search paths is generated based on monitoring previous tuning search paths during previous tuning and based on monitoring previous usage modes during the previous tuning, and adjusting a tuning search path for the tuning of the matching network based on the categorized history of previous tuning search paths and the usage mode where the adjusting of the starting point and the adjusting of the tuning search path reduces a tuning search time and provides a unique solution for the tuning. Other embodiments are disclosed.
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: December 1, 2015
    Assignee: BLACKBERRY LIMITED
    Inventors: Amir Danak, Shirook M. H. Ali, James Warden
  • Patent number: 9136595
    Abstract: A diversity antenna module comprising a first radiating element adapted to operate with a first transceiver circuit operating in at least one band and a second radiating element adapted to operate with a second transceiver circuit operating in at least one band. The first radiating element is disposed along a first side of a substrate and the second radiating element is disposed along a second side of the substrate, wherein the first and second sides are substantially parallel to each other, the first and second radiating elements being spatially dispersed from each another by a distance.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: September 15, 2015
    Assignee: BlackBerry Limited
    Inventors: Dong Wang, Qinjiang Rao, James Warden
  • Publication number: 20140349593
    Abstract: A system that incorporates teachings of the subject disclosure may include, for example, identifying a usage mode of the communication device, running a calibration session that includes adjusting a starting point for tuning of the matching network based on a categorized history of previous tuning search paths and based on the usage mode where the categorized history of previous tuning search paths is generated based on monitoring previous tuning search paths during previous tuning and based on monitoring previous usage modes during the previous tuning, and adjusting a tuning search path for the tuning of the matching network based on the categorized history of previous tuning search paths and the usage mode where the adjusting of the starting point and the adjusting of the tuning search path reduces a tuning search time and provides a unique solution for the tuning. Other embodiments are disclosed.
    Type: Application
    Filed: May 22, 2013
    Publication date: November 27, 2014
    Inventors: Amir Danak, Shirook M.H. Ali, James Warden
  • Publication number: 20140320364
    Abstract: Embodiments are directed to a substrate integrated waveguide (SIW) antenna structure comprising: a first layer configured to route a signal, at least a second layer configured for antenna use coupled to the first layer, and a SIW antenna flared in the E-plane. Embodiments are directed to a method comprising: fabricating a first layer configured to route a signal, fabricating at least a second layer configured for antenna use, coupling the first layer and the at least a second layer, and flaring a substrate integrated waveguide (SIW) antenna in the E-plane.
    Type: Application
    Filed: April 26, 2013
    Publication date: October 30, 2014
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Huanhuan Gu, Houssam Kanj, Christopher DeVries, James Warden
  • Publication number: 20140320373
    Abstract: Embodiments are directed to a balun structure comprising: a monopole antenna, and a microstrip coupled to the monopole antenna and comprising a ground plane modified to include at least two arms. Embodiments are directed to a balun structure comprising: a monopole antenna, and a microstrip coupled to the monopole antenna using a stepwise tapered microstrip feed.
    Type: Application
    Filed: April 26, 2013
    Publication date: October 30, 2014
    Applicant: Research In Motion Limited
    Inventors: Houssam Kanj, Huanhuan Gu, Christopher DeVries, James Warden
  • Publication number: 20140227981
    Abstract: A system that incorporates teachings of the subject disclosure may include, for example, determining a first voltage standing wave ratio (VSWR), selecting a VSWR circle from among a group of VSWR circles based on the first VSWR, identifying a group of sets of tuning settings for variable reactance elements of a matching network of the communication device where the identifying of the group of sets of tuning settings is based on each set of tuning settings of the group of sets of tuning settings being associated with the VSWR circle, and selecting a set of tuning settings from among the group of sets of tuning settings responsive to a second VSWR determined for the set of tuning settings satisfying a VSWR threshold. Other embodiments are disclosed.
    Type: Application
    Filed: February 14, 2013
    Publication date: August 14, 2014
    Applicants: Research in Motion Corporation, Research in Motion Limited
    Inventors: Marc Pecen, James Warden, Shirook M. Ali, Amir Danak
  • Publication number: 20140210686
    Abstract: Real-time calibration of a tunable matching network that matches the dynamic impedance of an antenna in a radio frequency receiver system. The radio frequency receiver system includes two non-linear equations that may be solved to determine the reflection coefficient of the antenna. The tunable matching network is repeatedly perturbed and the power received by the antenna is measured after each perturbation at the same node in the matching network. The measured power values are used by an optimizer in converging to a solution that provides the reflection coefficient of the antenna. The reflection coefficient of the antenna may be used to determine the input impedance of the antenna. The elements of the matching circuit are then adjusted to match the input impedance of the antenna.
    Type: Application
    Filed: April 2, 2014
    Publication date: July 31, 2014
    Applicant: BLACKBERRY LIMITED
    Inventors: Shirook M. ALI, James WARDEN, Mohamed BAKR
  • Publication number: 20140170992
    Abstract: A diversity antenna module comprising a first radiating element adapted to operate with a first transceiver circuit operating in at least one band and a second radiating element adapted to operate with a second transceiver circuit operating in at least one band. The first radiating element is disposed along a first side of a substrate and the second radiating element is disposed along a second side of the substrate, wherein the first and second sides are substantially parallel to each other, the first and second radiating elements being spatially dispersed from each another by a distance.
    Type: Application
    Filed: July 15, 2011
    Publication date: June 19, 2014
    Applicant: BlackBerry Limited
    Inventors: Dong Wang, Qinjiang Rao, James Warden
  • Publication number: 20140132478
    Abstract: A diversity antenna module comprising a first radiating element adapted to operate with a first transceiver circuit operating in at least one band and a second radiating element adapted to operate with a second transceiver circuit operating in at least one band. The first radiating element is disposed along a first side of a substrate and the second radiating element is disposed along a second side of the substrate, wherein the first and second sides are substantially perpendicular to each other, the first and second radiating elements being spatially dispersed from each another by a distance.
    Type: Application
    Filed: July 15, 2011
    Publication date: May 15, 2014
    Applicant: BLACKBERRY LIMITED
    Inventors: Dong Wang, Qinjiang Rao, James Warden
  • Publication number: 20130133055
    Abstract: An authentication method, system and device are provided to continuously collect dynamic personal identification data (DPID) samples through a user device by using one or more sensors to continuously collect biometric and location data samples associated with the user and then securely transfer the DPID samples to a central authentication server where attributes of the DPID samples may be captured and incorporated as part of a challenge-response pair which requests an arbitrarily generated N-tuple of the DPID samples from a predetermined time interval from the user device that is unique to the user and dynamic based on the sensed data and the time-interval of collection.
    Type: Application
    Filed: August 4, 2010
    Publication date: May 23, 2013
    Inventors: Shirook M. Ali, Christopher Labrador, James Warden, Kelce S. Wilson
  • Patent number: 8446318
    Abstract: Methods, devices, and systems for controlling a beamforming antenna with reconfigurable parasitic elements is provided.
    Type: Grant
    Filed: June 22, 2010
    Date of Patent: May 21, 2013
    Inventors: Shirook Ali, James Warden
  • Patent number: 8358615
    Abstract: Transmission of data from a portable communication device to a base station via a radio frequency signal uses a plurality of modulation and coding schemes and a protocol that has recurring frames. Each frame has a plurality of transmission slots, different numbers of which can be used to transmit data. When it is desired to transmit data a higher rate than was used previously, an attempt is made to increase the number transmission slots being used. If doing so, produces a transmission results in a specific absorption rate limit being exceeded, then the modulation and coding scheme is changed to one having a greater data coding rate. The power level and the number transmission slots then are set so that the data transmission does not exceed the specific absorption rate limit. The data is then transmitted by the portable communication device.
    Type: Grant
    Filed: March 11, 2010
    Date of Patent: January 22, 2013
    Assignee: Research In Motion Limited
    Inventors: Shirook Ali, James Womack, Amin Mobasher, James Warden
  • Publication number: 20110309980
    Abstract: Methods, devices, and systems for controlling a beamforming antenna with reconfigurable parasitic elements is provided.
    Type: Application
    Filed: June 22, 2010
    Publication date: December 22, 2011
    Inventors: Shirook ALI, James WARDEN
  • Publication number: 20110222469
    Abstract: Transmission of data from a portable communication device to a base station via a radio frequency signal uses a plurality of modulation and coding schemes and a protocol that has recurring frames. Each frame has a plurality of transmission slots, different numbers of which can be used to transmit data. When it is desired to transmit data a higher rate than was used previously, an attempt is made to increase the number transmission slots being used. If doing so, produces a transmission results in a specific absorption rate limit being exceeded, then the modulation and coding scheme is changed to one having a greater data coding rate. The power level and the number transmission slots then are set so that the data transmission does not exceed the specific absorption rate limit. The data is then transmitted by the portable communication device.
    Type: Application
    Filed: March 11, 2010
    Publication date: September 15, 2011
    Inventors: Shirook Ali, James Womack, Amin Mobasher, James Warden