Patents by Inventor N. Parker Willis

N. Parker Willis 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: 20210146143
    Abstract: Receiver-stimulator with folded or rolled up assembly of piezoelectric components, causing the receiver-stimulator to operate with a high degree of isotropy are disclosed. The receiver-stimulator comprises piezoelectric components, rectifier circuitry, and at least two stimulation electrodes. Isotropy allows the receiver-stimulator to be implanted with less concern regarding the orientation relative the transmitted acoustic field from an acoustic energy source.
    Type: Application
    Filed: September 24, 2020
    Publication date: May 20, 2021
    Inventors: David F. Moore, Paul Mohr, N. Parker Willis, Axel F. Brisken
  • Patent number: 10806938
    Abstract: Receiver-stimulator with folded or rolled up assembly of piezoelectric components, causing the receiver-stimulator to operate with a high degree of isotropy are disclosed. The receiver-stimulator comprises piezoelectric components, rectifier circuitry, and at least two stimulation electrodes. Isotropy allows the receiver-stimulator to be implanted with less concern regarding the orientation relative the transmitted acoustic field from an acoustic energy source.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: October 20, 2020
    Assignee: EBR Systems, Inc.
    Inventors: David F. Moore, Paul Mohr, N. Parker Willis, Axel F. Brisken
  • Publication number: 20200276447
    Abstract: Delivery of an implantable wireless receiver-stimulator (R-S) into the heart using delivery catheter is described. R-S comprises a cathode and an anode and wirelessly receives and converts energy, such as acoustic ultrasound energy, to electrical energy to stimulate the heart. Conductive wires routed through the delivery system temporarily connect R-S electrodes to external monitor and pacing controller. R-S comprises a first temporary electrical connection from the catheter to the cathode, and a second temporary electrical connection from the catheter to the anode. Temporary electrical connections allow external monitoring of heart's electrical activity as sensed by R-S electrodes to determine tissue viability for excitation as well as to assess energy conversion efficiency.
    Type: Application
    Filed: May 20, 2020
    Publication date: September 3, 2020
    Inventors: David F. Moore, Mark W. Cowan, N. Parker Willis
  • Publication number: 20200246070
    Abstract: An apparatus may be used for ablating a target tissue region disposed along a tissue surface. The apparatus may comprise a means for directing ablating energy into the target tissue region through the tissue surface and a means for imaging the tissue surface along the target tissue region while selectively directing the ablating energy. The imaging means may be coupled to the energy directing means.
    Type: Application
    Filed: March 27, 2020
    Publication date: August 6, 2020
    Inventors: N. Parker Willis, Zachary J. Malchano, Chris A. Rothe, Vahid Saadat, Ruey-Feng Peh, David Miller, Edmund A. Tam
  • Publication number: 20200230426
    Abstract: Method and systems for optimizing acoustic energy transmission in implantable devices are disclosed. Transducer elements transmit acoustic locator signals towards a receiver assembly, and the receiver responds with a location signal. The location signal can reveal information related to the location of the receiver and the efficiency of the transmitted acoustic beam received by the receiver. This information enables the transmitter to target the receiver and optimize the acoustic energy transfer between the transmitter and the receiver. The energy can be used for therapeutic purposes, for example, stimulating tissue or for diagnostic purposes.
    Type: Application
    Filed: October 15, 2019
    Publication date: July 23, 2020
    Inventors: N. Parker Willis, Axel F. Brisken, Mark W. Cowan, Michael Pare, Robert Fowler, James Brennan
  • Patent number: 10688307
    Abstract: Delivery of an implantable wireless receiver-stimulator (R-S) into the heart using delivery catheter is described. R-S comprises a cathode and an anode and wirelessly receives and converts energy, such as acoustic ultrasound energy, to electrical energy to stimulate the heart. Conductive wires routed through the delivery system temporarily connect R-S electrodes to external monitor and pacing controller. R-S comprises a first temporary electrical connection from the catheter to the cathode, and a second temporary electrical connection from the catheter to the anode. Temporary electrical connections allow external monitoring of heart's electrical activity as sensed by R-S electrodes to determine tissue viability for excitation as well as to assess energy conversion efficiency.
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: June 23, 2020
    Assignee: EBR Systems, Inc.
    Inventors: David F. Moore, Mark W. Cowan, N. Parker Willis
  • Publication number: 20200179704
    Abstract: Systems, devices, and methods for tracking and determining the motion of a cardiac implant is disclosed. The motion of the implant is determined by transmitting acoustic energy to a tissue location using an acoustic controller-transmitter comprising an array of acoustic transducers; wherein the implant is configured to convert the transmitted acoustic energy to electrical energy; and the tracking is achieved by determining the electrical energy delivered to the tissue throughout one or more cardiac cycles in order to create a motion profile of the cardiac implant.
    Type: Application
    Filed: August 1, 2018
    Publication date: June 11, 2020
    Inventor: N. Parker Willis
  • Patent number: 10624695
    Abstract: A method of ablating a tissue region within a blood-filled environment comprises restraining a fluid within a visualization field in a portion of the blood-filled environment and visualizing the tissue region through the fluid within the visualization field. The method also includes transmitting ablating electrical energy from the fluid into the visualized tissue region.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: April 21, 2020
    Assignee: Intuitive Surgical Operations, Inc.
    Inventors: N. Parker Willis, Zachary J. Malchano, Chris A. Rothe, Vahid Saadat, Ruey-Feng Peh, David Miller, Edmund A. Tam
  • Patent number: 10512785
    Abstract: A controller-transmitter transmits acoustic energy through the body to an implanted acoustic receiver-stimulator. The receiver-stimulator converts the acoustic energy into electrical energy and delivers the electrical energy to tissue using an electrode assembly. The receiver-stimulator limits the output voltage delivered to the tissue to a predetermined maximum output voltage. In the presence of interfering acoustic energy sources output voltages are thereby limited prior to being delivered to the tissue. Furthermore, the controller-transmitter estimates the output voltage that is delivered to the tissue by the implanted receiver-stimulator. The controller-transmitter measures a query spike voltage resulting from the electrical energy delivered to the tissue by the receiver-stimulator, and computes a ratio of the predetermined maximum output voltage and a maximum query spike voltage. The maximum query spike voltage is computed by detecting a query spike voltage plateau.
    Type: Grant
    Filed: January 17, 2019
    Date of Patent: December 24, 2019
    Assignee: EBR Systems, Inc.
    Inventors: David F. Moore, Paul Mohr, N. Parker Willis, Axel F. Brisken
  • Patent number: 10456588
    Abstract: Method and systems for optimizing acoustic energy transmission in implantable devices are disclosed. Transducer elements transmit acoustic locator signals towards a receiver assembly, and the receiver responds with a location signal. The location signal can reveal information related to the location of the receiver and the efficiency of the transmitted acoustic beam received by the receiver. This information enables the transmitter to target the receiver and optimize the acoustic energy transfer between the transmitter and the receiver. The energy can be used for therapeutic purposes, for example, stimulating tissue or for diagnostic purposes.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: October 29, 2019
    Assignee: EBR Systems, Inc.
    Inventors: N. Parker Willis, Axel F. Brisken, Mark W. Cowan, Michael Pare, Robert Fowler, James Brennan
  • Publication number: 20190151667
    Abstract: A controller-transmitter transmits acoustic energy through the body to an implanted acoustic receiver-stimulator. The receiver-stimulator converts the acoustic energy into electrical energy and delivers the electrical energy to tissue using an electrode assembly. The receiver-stimulator limits the output voltage delivered to the tissue to a predetermined maximum output voltage. In the presence of interfering acoustic energy sources output voltages are thereby limited prior to being delivered to the tissue. Furthermore, the controller-transmitter estimates the output voltage that is delivered to the tissue by the implanted receiver-stimulator. The controller-transmitter measures a query spike voltage resulting from the electrical energy delivered to the tissue by the receiver-stimulator, and computes a ratio of the predetermined maximum output voltage and a maximum query spike voltage. The maximum query spike voltage is computed by detecting a query spike voltage plateau.
    Type: Application
    Filed: January 17, 2019
    Publication date: May 23, 2019
    Inventors: David F. Moore, Paul Mohr, N. Parker Willis, Axel F. Brisken
  • Publication number: 20180353763
    Abstract: Method and systems for optimizing acoustic energy transmission in implantable devices are disclosed. Transducer elements transmit acoustic locator signals towards a receiver assembly, and the receiver responds with a location signal. The location signal can reveal information related to the location of the receiver and the efficiency of the transmitted acoustic beam received by the receiver. This information enables the transmitter to target the receiver and optimize the acoustic energy transfer between the transmitter and the receiver. The energy can be used for therapeutic purposes, for example, stimulating tissue or for diagnostic purposes.
    Type: Application
    Filed: August 21, 2018
    Publication date: December 13, 2018
    Applicant: EBR Systems, Inc.
    Inventors: N. Parker Willis, Axel F. Brisken, Mark W. Cowan, Michael Pare, Robert Fowler, James Brennan
  • Publication number: 20180345026
    Abstract: Receiver-stimulator with folded or rolled up assembly of piezoelectric components, causing the receiver-stimulator to operate with a high degree of isotropy are disclosed. The receiver-stimulator comprises piezoelectric components, rectifier circuitry, and at least two stimulation electrodes. Isotropy allows the receiver-stimulator to be implanted with less concern regarding the orientation relative the transmitted acoustic field from an acoustic energy source.
    Type: Application
    Filed: July 31, 2018
    Publication date: December 6, 2018
    Applicant: EBR Systems, Inc.
    Inventors: David F. Moore, Paul Mohr, N. Parker Willis, Axel F. Brisken
  • Publication number: 20180280704
    Abstract: Delivery of an implantable wireless receiver-stimulator (R-S) into the heart using delivery catheter is described. R-S comprises a cathode and an anode and wirelessly receives and converts energy, such as acoustic ultrasound energy, to electrical energy to stimulate the heart. Conductive wires routed through the delivery system temporarily connect R-S electrodes to external monitor and pacing controller. R-S comprises a first temporary electrical connection from the catheter to the cathode, and a second temporary electrical connection from the catheter to the anode. Temporary electrical connections allow external monitoring of heart's electrical activity as sensed by R-S electrodes to determine tissue viability for excitation as well as to assess energy conversion efficiency.
    Type: Application
    Filed: January 23, 2018
    Publication date: October 4, 2018
    Applicant: EBR Systems, Inc.
    Inventors: David F. Moore, Mark W. Cowan, N. Parker Willis
  • Patent number: 10080903
    Abstract: Method and systems for optimizing acoustic energy transmission in implantable devices are disclosed. Transducer elements transmit acoustic locator signals towards a receiver assembly, and the receiver responds with a location signal. The location signal can reveal information related to the location of the receiver and the efficiency of the transmitted acoustic beam received by the receiver. This information enables the transmitter to target the receiver and optimize the acoustic energy transfer between the transmitter and the receiver. The energy can be used for therapeutic purposes, for example, stimulating tissue or for diagnostic purposes.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: September 25, 2018
    Assignee: EBR SYSTEMS, INC.
    Inventors: N. Parker Willis, Axel F. Brisken, Mark W. Cowan, Michael Pare, Robert Fowler, James Brennan
  • Patent number: 10052493
    Abstract: Receiver-stimulator with folded or rolled up assembly of piezoelectric components, causing the receiver-stimulator to operate with a high degree of isotropy are disclosed. The receiver-stimulator comprises piezoelectric components, rectifier circuitry, and at least two stimulation electrodes. Isotropy allows the receiver-stimulator to be implanted with less concern regarding the orientation relative the transmitted acoustic field from an acoustic energy source.
    Type: Grant
    Filed: April 25, 2016
    Date of Patent: August 21, 2018
    Assignee: EBR Systems, Inc.
    Inventors: David F. Moore, Paul Mohr, N. Parker Willis, Axel F. Brisken
  • Patent number: 9981138
    Abstract: A controller-transmitter transmits acoustic energy through the body to an implanted acoustic receiver-stimulator. The receiver-stimulator converts the acoustic energy into electrical energy and delivers the electrical energy to tissue using an electrode assembly. The receiver-stimulator limits the output voltage delivered to the tissue to a predetermined maximum output voltage. In the presence of interfering acoustic energy sources output voltages are thereby limited prior to being delivered to the tissue. Furthermore, the controller-transmitter estimates the output voltage that is delivered to the tissue by the implanted receiver-stimulator. The controller-transmitter measures a query spike voltage resulting from the electrical energy delivered to the tissue by the receiver-stimulator, and computes a ratio of the predetermined maximum output voltage and a maximum query spike voltage. The maximum query spike voltage is computed by detecting a query spike voltage plateau.
    Type: Grant
    Filed: October 9, 2012
    Date of Patent: May 29, 2018
    Assignee: EBR Systems, Inc.
    Inventor: N. Parker Willis
  • Patent number: 9907968
    Abstract: Delivery of an implantable wireless receiver-stimulator (R-S) into the heart using delivery catheter is described. R-S comprises a cathode and an anode and wirelessly receives and converts energy, such as acoustic ultrasound energy, to electrical energy to stimulate the heart. Conductive wires routed through the delivery system temporarily connect R-S electrodes to external monitor and pacing controller. R-S comprises a first temporary electrical connection from the catheter to the cathode, and a second temporary electrical connection from the catheter to the anode. Temporary electrical connections allow external monitoring of heart's electrical activity as sensed by R-S electrodes to determine tissue viability for excitation as well as to assess energy conversion efficiency.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: March 6, 2018
    Assignee: EBR Systems, Inc.
    Inventors: David F. Moore, Mark W. Cowan, N. Parker Willis
  • Patent number: 9616237
    Abstract: Method and systems for determining the location or identify of implantable devices are disclosed. An implantable device generates an electrical output and then modifies the output at a pre-configured interval for a pre-configured period. A sensor detects the modified output and locates or identifies the implantable device based on the modified output.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: April 11, 2017
    Assignee: EBR SYSTEMS, INC.
    Inventors: Mike Pare, David Moore, N. Parker Willis
  • Publication number: 20160310749
    Abstract: Receiver-stimulator with folded or rolled up assembly of piezoelectric components, causing the receiver-stimulator to operate with a high degree of isotropy are disclosed. The receiver-stimulator comprises piezoelectric components, rectifier circuitry, and at least two stimulation electrodes. Isotropy allows the receiver-stimulator to be implanted with less concern regarding the orientation relative the transmitted acoustic field from an acoustic energy source.
    Type: Application
    Filed: April 25, 2016
    Publication date: October 27, 2016
    Inventors: David F. Moore, Paul Mohr, N. Parker Willis, Axel F. Brisken