Patents by Inventor David Hart

David Hart 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: 11940399
    Abstract: Systems and methods of quantum sensing include obtaining information regarding a target signal in electronic spin states of quantum defects in an ensemble of quantum defects, mapping the information regarding the target signal from the electronic spin states of the quantum defects to corresponding nuclear spin states associated with the quantum defects, applying a light pulse to the ensemble of quantum defects to reset the electronic spin states of the quantum defects, and repeating a readout stage a plurality of times within a readout duration. The readout stage includes mapping the information regarding the target signal back from the nuclear spin states to the corresponding electronic spin states and applying a data acquisition readout pulse to optically measure the electronic spin states of the quantum defects.
    Type: Grant
    Filed: June 1, 2022
    Date of Patent: March 26, 2024
    Assignees: University of Maryland, College Park, The President and Fellows of Harvard College
    Inventors: Ronald Walsworth, Nithya Arunkumar, Connor Hart, Dominik Bucher, David Glenn
  • Patent number: 11911294
    Abstract: Various embodiments of cervical plates for treating the spine are provided. The cervical plates include an access surface and a bone facing surface. The cervical plate further includes at least one hole between the access surface and the bone facing surface. The hole includes a trajectory surface that guides an anchor into a corner or edge of a vertebral body, wherein a portion of the hole extends into the disc space region. In some embodiments, the cervical plate includes a ledge to support high angle screw insertion. In some embodiments, an interbody implant is provided. The cervical plate and the interbody spacer can have a corresponding curvature.
    Type: Grant
    Filed: January 26, 2022
    Date of Patent: February 27, 2024
    Assignee: Spinal Elements, Inc.
    Inventors: Rachid Ouidja, David Hart, Jason Blain
  • Publication number: 20240057303
    Abstract: The semiconductor cooling arrangement comprises one or more semiconductor assemblies, a housing, and one or more baffles. Each semiconductor assembly comprises a heatsink, a semiconductor die, an encapsulant, and electrical connections. The semiconductor die is bonded to the heatsink and contains a semiconductor power device. The encapsulant covers the semiconductor die. The side of the heatsink to which the semiconductor die is bonded extends beyond the encapsulant. The electrical connections pass through the encapsulant and to the semiconductor die. The housing has a chamber for housing the one or more assemblies. Each baffle comprises through-holes arranged such that fluid flows through the through-holes to a region of a respective semiconductor assembly to which the semiconductor power device is mounted, or to a region of the heatsink of the semiconductor assembly opposite a location to which the semiconductor power device is mounted.
    Type: Application
    Filed: December 17, 2021
    Publication date: February 15, 2024
    Inventors: Simon David HART, Daniel RENDELL, Paul Donald SPENDLEY, Rajesh KUDIKALA
  • Patent number: 11887881
    Abstract: A method of fabricating a substrate table includes supporting a table base and disposing a coating on a surface of the table base. The surface of the table base is substantially flat. The coating has a non-uniform thickness. The coating exerts a stress on the table so as to bend the table base. The non-uniform thickness causes a surface of the coating to become substantially flat after the bending.
    Type: Grant
    Filed: April 21, 2020
    Date of Patent: January 30, 2024
    Assignee: ASML HOLDING N.V.
    Inventors: Bruce Tirri, Ping Zhou, Elizabeth Mary Stone, David Hart Peterson, Mehmet Ali Akbas, Ryan Mayer, Richard Bryan Lewis
  • Publication number: 20240028073
    Abstract: The present invention is comprised of a pendant with a wearable display (functional jewelry) and accompanying mobile app that allow users to choose an emoji/image from the app for display on the pendant. The invention will transmit image data (jpegs, gifs) from its mobile app for wireless pickup by the “Emogems” pendant (AMOLED 1.4? round display). One image/emoji will be displayed on the pendant at a time, although the user will be able to replace displayed images at will by making selections from the emoji library on the app. When no emoji is selected, while the display is on, the Emogems logo is visible on the display as a default image. Most images/emoji will be static, but some include animated gifs that animate indefinitely.
    Type: Application
    Filed: July 25, 2022
    Publication date: January 25, 2024
    Inventor: David Hart
  • Patent number: 11791713
    Abstract: Described herein is a method of cooling a plurality of power devices, where the power devices are arranged as a plurality of switches used to generate a three-phase output AC voltage. Based on power device stress data, one or more switches (associated with one or more phase output AC voltages) may be identified as requiring more cooling than other of the switches. The switches are controlled to apply a common mode component voltage to each of the three phases for at least a portion of one or more output AC voltage segments. The common mode component voltage has a maximum amplitude that is sufficient to clamp the phase AC output voltage of the identified phase(s) to the positive supply rail voltage and/or negative rail supply voltage when the respective phase AC voltage is approaching respectively the positive supply rail voltage or negative supply rail voltage to cool the identified switch(es).
    Type: Grant
    Filed: December 22, 2021
    Date of Patent: October 17, 2023
    Assignee: YASA LIMITED
    Inventors: Simon David Hart, Samuel David Ahearn
  • Patent number: 11757374
    Abstract: We describe techniques to reduce DC ripple voltage in an inverter by determining a plurality of switching events for each of the three phases in each Pulse Width Modulation (PWM) period. The switching events provide a desired target output voltage for the respective PWM period. From this determination of the switching events, a comparison can be made to determine a first time period between a first and second switching event across all of the phases, and a second time period between the second and a third switching event across all of the phases. The timing of one or more switching events in only one of the phases in the respective PWM period is adjusted in response to the determined time period being greater than a threshold in order to reduce the determined first or second time period.
    Type: Grant
    Filed: November 19, 2021
    Date of Patent: September 12, 2023
    Assignee: YASA LIMITED
    Inventors: Simon David Hart, Samuel David Ahearn, Richard Phillips, Tim Woolmer
  • Patent number: 11646676
    Abstract: A modulation technique is described in which a controller modulates the output AC voltages to introduce an offset to the phase that is most positive or most negative such that the phase is clamped to the +dc supply when the respective phase is most positive and to the ?dc supply rail when most negative. The offset is provided by introducing a common mode component voltage to all of the phases over a plurality of output angle segments. In order to reduce the Noise Vibration and Harshness (NVH) and EMI, the common mode component voltage amplitude is varied over the output angles within the respective segment between a minimum and a maximum in order to control a slew rate of the rising or falling edges of the three phase AC output voltages.
    Type: Grant
    Filed: December 20, 2021
    Date of Patent: May 9, 2023
    Assignee: YASA LIMITED
    Inventors: Simon David Hart, Samuel David Ahearn
  • Publication number: 20220387189
    Abstract: A spinal implant device is provided comprising a body structure with a central cavity and a movable lid configured to cover the central cavity. The movable lid is configured to be opened to pack a material in the central cavity. The movable lid can be connected to the body structure with a moveable joint. The spinal implant device can include a compressible feature. A method for treating the spine is provided comprising opening a movable lid of a spinal implant device, packing a material in a central cavity of a spinal implant device, closing the movable lid, and inserting the spinal implant device between vertebrae.
    Type: Application
    Filed: May 17, 2022
    Publication date: December 8, 2022
    Inventors: Jason Blain, David Hart, Dean Johnson, Gregory Martin
  • Patent number: 11486221
    Abstract: A wellbore tool includes a rod with a plurality of rod sections. The rod is configured to be placed within a wellbore casing of a low-pressure hydrocarbon well. A plurality of sealing elements are positioned at a downhole end of the rod. Each sealing element is configured to provide a gas-tight seal between the sealing element and an inner wall of the wellbore casing. A handle positioned at an uphole end of the rod provides a hand grip for a user of the wellbore tool.
    Type: Grant
    Filed: January 13, 2021
    Date of Patent: November 1, 2022
    Inventor: David Hart
  • Patent number: 11422289
    Abstract: A method of forming an anti-reflection layer, the method including applying a first mixture to an object, the first mixture made from a combination of aluminum tri-sec-butoxide (ATSB), a first chelating agent, water and an alcohol; removing a majority of the alcohol from the applied first mixture; after the removing, applying a second mixture to the object, the second mixture made from a combination of aluminum tri-sec-butoxide, a second chelating agent different than the first chelating agent, water and an alcohol; and removing a majority of the alcohol from the applied second mixture, wherein the applied first and second mixtures are used to form the anti-reflection layer.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: August 23, 2022
    Assignee: ASML Holding N.V.
    Inventors: Parag Vinayak Kelkar, David Hart Peterson
  • Publication number: 20220237799
    Abstract: The present disclosure relates to a multi-model object segmentation system that provides a multi-model object segmentation framework for automatically segmenting objects in digital images. In one or more implementations, the multi-model object segmentation system utilizes different types of object segmentation models to determine a comprehensive set of object masks for a digital image. In various implementations, the multi-model object segmentation system further improves and refines object masks in the set of object masks utilizing specialized object segmentation models, which results in more improved accuracy and precision with respect to object selection within the digital image. Further, in some implementations, the multi-model object segmentation system generates object masks for portions of a digital image otherwise not captured by various object segmentation models.
    Type: Application
    Filed: January 26, 2021
    Publication date: July 28, 2022
    Inventors: Brian Price, David Hart, Zhihong Ding, Scott Cohen
  • Patent number: 11382769
    Abstract: A spinal implant device is provided comprising a body structure with a central cavity and a movable lid configured to cover the central cavity. The movable lid is configured to be opened to pack a material in the central cavity. The movable lid can be connected to the body structure with a moveable joint. The spinal implant device can include a compressible feature. A method for treating the spine is provided comprising opening a movable lid of a spinal implant device, packing a material in a central cavity of a spinal implant device, closing the movable lid, and inserting the spinal implant device between vertebrae.
    Type: Grant
    Filed: September 20, 2019
    Date of Patent: July 12, 2022
    Assignee: Spinal Elements, Inc.
    Inventors: Jason Blain, David Hart, Dean Johnson, Gregory Martin
  • Publication number: 20220216092
    Abstract: A method of fabricating a substrate table includes supporting a table base and disposing a coating on a surface of the table base. The surface of the table base is substantially flat. The coating has a non-uniform thickness. The coating exerts a stress on the table so as to bend the table base. The non-uniform thickness causes a surface of the coating to become substantially flat after the bending.
    Type: Application
    Filed: April 21, 2020
    Publication date: July 7, 2022
    Applicant: ASML HOLDING N.V.
    Inventors: Bruce TIRRI, Ping ZHOU, Elizabeth Mary STONE, David Hart PETERSON, Mehmet Ali AKBAS, Ryan MAYER, Richard Bryan LEWIS
  • Publication number: 20220200442
    Abstract: Described herein is a method of cooling a plurality of power devices, where the power devices are arranged as a plurality of switches used to generate a three-phase output AC voltage. Based on power device stress data, one or more switches (associated with one or more phase output AC voltages) may be identified as requiring more cooling than other of the switches. The switches are controlled to apply a common mode component voltage to each of the three phases for at least a portion of one or more output AC voltage segments. The common mode component voltage has a maximum amplitude that is sufficient to clamp the phase AC output voltage of the identified phase(s) to the positive supply rail voltage and/or negative rail supply voltage when the respective phase AC voltage is approaching respectively the positive supply rail voltage or negative supply rail voltage to cool the identified switch(es).
    Type: Application
    Filed: December 22, 2021
    Publication date: June 23, 2022
    Inventors: Simon David HART, Samuel David AHEARN
  • Publication number: 20220192841
    Abstract: A spinal implant device is provided comprising a body structure with a central cavity and a movable lid configured to cover the central cavity. The movable lid is configured to be opened to pack a material in the central cavity. The movable lid can be connected to the body structure with a moveable joint. The spinal implant device can include a compressible feature. A method for treating the spine is provided comprising opening a movable lid of a spinal implant device, packing a material in a central cavity of a spinal implant device, closing the movable lid, and inserting the spinal implant device between vertebrae.
    Type: Application
    Filed: December 15, 2021
    Publication date: June 23, 2022
    Inventors: Jason Blain, David Hart, Dean Johnson, Gregory Martin, Morton Albert, Samuel Tolpen, David Ortiz, Christiana Gabrielle Salvosa
  • Publication number: 20220199492
    Abstract: A semiconductor cooling arrangement. The semiconductor cooling arrangement comprises one or more semiconductor assemblies, a housing, and one or more baffles. Each assembly comprises a heatsink and one or more semiconductor power devices mounted on and thermally coupled to the heatsink. The housing is for housing the one or more assemblies in a chamber within the housing, and comprises inlet and outlet ports in fluid communication with the chamber. The baffles are arranged such that fluid flows through each baffle to a respective heatsink. Each baffle comprises through-holes arranged such that fluid flows through the through holes to a region of the semiconductor assembly to which a semiconductor power device is mounted, or to a region of the heatsink opposite a location to which a semiconductor power device is mounted.
    Type: Application
    Filed: December 22, 2021
    Publication date: June 23, 2022
    Inventors: Simon David HART, Daniel RENDELL, Paul Donald SPENDLEY, Rajesh KUDIKALA
  • Publication number: 20220200436
    Abstract: A modulation technique is described in which a controller modulates the output AC voltages to introduce an offset to the phase that is most positive or most negative such that the phase is clamped to the +dc supply when the respective phase is most positive and to the ?dc supply rail when most negative. The offset is provided by introducing a common mode component voltage to all of the phases over a plurality of output angle segments. In order to reduce the Noise Vibration and Harshness (NVH) and EMI, the common mode component voltage amplitude is varied over the output angles within the respective segment between a minimum and a maximum in order to control a slew rate of the rising or falling edges of the three phase AC output voltages.
    Type: Application
    Filed: December 20, 2021
    Publication date: June 23, 2022
    Inventors: Simon David HART, Samuel David AHEARN
  • Publication number: 20220174840
    Abstract: A cooling arrangement, for cooling power devices such as semiconductor power devices, comprises a housing having sidewalls around the periphery of a baseplate, and a capping plate opposing the baseplate. The housing forms a cavity through which cooling fluid may flow between an inlet and an outlet disposed in the housing. Within the cavity is provided one or more baffles that are arranged to force the cooling fluid flowing between the inlet and outlet along a labyrinthine path through the cavity. At least one of the baffles comprises at least one through-hole, which permit cooling fluid to pass there through from one side of the baffle to the other.
    Type: Application
    Filed: March 24, 2020
    Publication date: June 2, 2022
    Inventors: Simon David HART, Rajesh KUDIKALA
  • Publication number: 20220166346
    Abstract: We describe techniques to reduce DC ripple voltage in an inverter by determining a plurality of switching events for each of the three phases in each Pulse Width Modulation (PWM) period. The switching events provide a desired target output voltage for the respective PWM period. From this determination of the switching events, a comparison can be made to determine a first time period between a first and second switching event across all of the phases, and a second time period between the second and a third switching event across all of the phases. The timing of one or more switching events in only one of the phases in the respective PWM period is adjusted in response to the determined time period being greater than a threshold in order to reduce the determined first or second time period.
    Type: Application
    Filed: November 19, 2021
    Publication date: May 26, 2022
    Inventors: Simon David HART, Samuel David AHEARN, Richard PHILLIPS, Tim WOOLMER