Patents by Inventor David Ligon
David Ligon 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).
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Patent number: 11957916Abstract: Implantable medical devices (IMDs), systems, and methods for use therewith are disclosed. One such method is for use by a leadless pacemaker (LP) configured to perform conductive communication with another implantable medical device (IMD). The method includes the LP storing information that specifies when, within a cardiac cycle, the LP and the other IMD implanted in a patient are likely oriented relative to one another such that conductive communication therebetween should be successful. The method also includes the LP sensing a signal indicative of cardiac activity of the patient over a plurality of cardiac cycles, and outputting one or more conductive communication pulses, during a portion of at least one of the cardiac cycles, wherein the portion of the at least one of the cardiac cycles is identified based on the signal that is sensed and the information that is stored.Type: GrantFiled: January 31, 2023Date of Patent: April 16, 2024Assignee: Pacesetter, Inc.Inventors: Xiaoyi Min, David Ligon, Weiqun Yang, Shawn Chen, Matthew G. Fishler
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Publication number: 20230314714Abstract: A method and apparatus for controlling propagation of a light beam using a beveled endcap of an optical fiber, where the endcap has a first end coupled to the optical fiber and a second end having a bevel that circumscribes a facet. The bevel has an angle relative to the plane of the facet that directs a peripheral portion of the light beam towards a lens and the facet directs a central portion of the light beam towards the lens. As such, the light beam is collimated with substantially all of the power of the light beam propagating through the lens and all the power delivered with fiber core to the output endcap is propagating through the lens despite the divergence of the delivered beam and a restricted aperture of the lens.Type: ApplicationFiled: April 4, 2022Publication date: October 5, 2023Inventors: Leonid A. Beresnev, David A. Ligon, Angel S. Flores, Mark Dubinskiy, Kristan P. Gurton, Chatt C. Williamson
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Patent number: 11762149Abstract: A method and apparatus for controlling propagation of a light beam using a beveled endcap of an optical fiber, where the endcap has a first end coupled to the optical fiber and a second end having a bevel that circumscribes a facet. The bevel has an angle relative to the plane of the facet that directs a peripheral portion of the light beam towards a lens and the facet directs a central portion of the light beam towards the lens. As such, the light beam is collimated with substantially all of the power of the light beam propagating through the lens and all the power delivered with fiber core to the output endcap is propagating through the lens despite the divergence of the delivered beam and a restricted aperture of the lens.Type: GrantFiled: April 4, 2022Date of Patent: September 19, 2023Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Leonid A. Beresnev, David A. Ligon, Angel S. Flores, Mark Dubinskiy, Kristan P. Gurton, Chatt C. Williamson
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Publication number: 20230233867Abstract: Embodiments described herein relate to implantable medical devices (IMDs) and methods for use therewith. Such a method includes using an accelerometer of an IMD (e.g., a leadless pacemaker) to produce one or more accelerometer outputs indicative of the orientation of the IMD. The method can also include the IMD using an accelerometer to identify when the orientation of the IMD is such that the IMD will likely be able to successfully communicate with another IMD via one or more communication pulses sent from the IMD to the other IMD. The method also includes the IMD sending of the one or more communication pulses, that are used to communicate with the other IMD, when the orientation of the IMD is such that the IMD will likely be able to successfully communicate with the other IMD via one or more communication pulses sent from the IMD to the other IMD.Type: ApplicationFiled: March 22, 2023Publication date: July 27, 2023Applicant: Pacesetter, Inc.Inventors: Xiaoyi Min, David Ligon, Weiqun Yang, Shawn Chen, Matthew G. Fishler
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Publication number: 20230173284Abstract: Implantable medical devices (IMDs), systems, and methods for use therewith are disclosed. One such method is for use by a leadless pacemaker (LP) configured to perform conductive communication with another implantable medical device (IMD). The method includes the LP storing information that specifies when, within a cardiac cycle, the LP and the other IMD implanted in a patient are likely oriented relative to one another such that conductive communication therebetween should be successful. The method also includes the LP sensing a signal indicative of cardiac activity of the patient over a plurality of cardiac cycles, and outputting one or more conductive communication pulses, during a portion of at least one of the cardiac cycles, wherein the portion of the at least one of the cardiac cycles is identified based on the signal that is sensed and the information that is stored.Type: ApplicationFiled: January 31, 2023Publication date: June 8, 2023Applicant: Pacesetter, Inc.Inventors: Xiaoyi Min, David Ligon, Weiqun Yang, Shawn Chen, Matthew G. Fishler
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Patent number: 11642536Abstract: Embodiments described herein relate to implantable medical devices (IMDs) and methods for use therewith. Such a method includes using an accelerometer of an IMD (e.g., a leadless pacemaker) to produce one or more accelerometer outputs indicative of the orientation of the IMD. The method can also include controlling communication pulse parameter(s) of one or more communication pulses (produced by pulse generator(s)) based on accelerator output(s) indicative of the orientation of the IMD. The communication pulse parameter(s) that is/are controlled can be, e.g., communication pulse amplitude, communication pulse width, communication pulse timing, and/or communication pulse morphology. Such embodiments can be used to improve conductive communications between IMDs whose orientation relative to one another may change over time, e.g., due to changes in posture and/or due to cardiac motion over a cardiac cycle.Type: GrantFiled: July 8, 2021Date of Patent: May 9, 2023Assignee: Pacesetter, Inc.Inventors: Xiaoyi Min, David Ligon, Weiqun Yang, Shawn Chen, Matthew G. Fishler
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Patent number: 11296477Abstract: A method, apparatus and system for coherent beam combining (CBC) in high energy fiber laser (HEL) systems include generating a reference interference pattern of a signal source including at least two single-mode optical signals, capturing and evaluating the reference interference pattern, maximizing an intensity of the selected area of the captured, reference interference pattern, increasing a linewidth of the optical signals generating the reference interference pattern until the reference interference pattern is degraded, and adjusting a delay time of one of the at least two single-mode optical signals until the reference interference pattern is recovered, by adjusting a value of a delay of a delayed RF signal with a broaden linewidth to a respective EO linewidth broadening modulator in at least one channel of the at least two single-mode optical signals while evaluating the interference pattern on a display device.Type: GrantFiled: May 1, 2019Date of Patent: April 5, 2022Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Leonid A. Beresnev, Kristan P. Gurton, David A. Ligon, Anthony R. Valenzuela, Chatt C. Williamson
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Patent number: 11219774Abstract: A computer implemented method and device for providing dual chamber sensing with a single chamber leadless implantable medical device (LIMD) are provided. The method is under control of one or more processors in the LIMD configured with specific executable instructions. The method obtains a far field (FF) cardiac activity (CA) signals for activity in a remote chamber of a heart and compares the far field CA signals to a P-wave template to identify an event of interest associated with the remote chamber. The method sets an atrial-ventricular (AV) delay based on the P-wave identified and delivers pacing pulses at a pacing site of interest to a local chamber based on the AV delay.Type: GrantFiled: May 29, 2019Date of Patent: January 11, 2022Assignee: Pacesetter, Inc.Inventors: Gene A. Bornzin, Nima Badie, Chunlan Jiang, David Ligon
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Publication number: 20210330986Abstract: Embodiments described herein relate to implantable medical devices (IMDs) and methods for use therewith. Such a method includes using an accelerometer of an IMD (e.g., a leadless pacemaker) to produce one or more accelerometer outputs indicative of the orientation of the IMD. The method can also include controlling communication pulse parameter(s) of one or more communication pulses (produced by pulse generator(s)) based on accelerator output(s) indicative of the orientation of the IMD. The communication pulse parameter(s) that is/are controlled can be, e.g., communication pulse amplitude, communication pulse width, communication pulse timing, and/or communication pulse morphology. Such embodiments can be used to improve conductive communications between IMDs whose orientation relative to one another may change over time, e.g., due to changes in posture and/or due to cardiac motion over a cardiac cycle.Type: ApplicationFiled: July 8, 2021Publication date: October 28, 2021Applicant: Pacesetter, Inc.Inventors: Xiaoyi Min, David Ligon, Weiqun Yang, Shawn Chen, Matthew G. Fishler
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Patent number: 11090497Abstract: Embodiments described herein relate to implantable medical devices (IMDs) and methods for use therewith. Such a method includes using an accelerometer of an IMD (e.g., a leadless pacemaker) to produce one or more accelerometer outputs indicative of the orientation of the IMD. The method can also include controlling communication pulse parameter(s) of one or more communication pulses (produced by pulse generator(s)) based on accelerometer output(s) indicative of the orientation of the IMD. The communication pulse parameter(s) that is/are controlled can be, e.g., communication pulse amplitude, communication pulse width, communication pulse timing, and/or communication pulse morphology. Such embodiments can be used to improve conductive communications between IMDs whose orientation relative to one another may change over time, e.g., due to changes in posture and/or due to cardiac motion over a cardiac cycle.Type: GrantFiled: October 25, 2018Date of Patent: August 17, 2021Assignee: Pacesetter, Inc.Inventors: Xiaoyi Min, David Ligon, Weiqun Yang, Shawn Chen, Matthew G. Fishler
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Publication number: 20200376282Abstract: A computer implemented method and device for providing dual chamber sensing with a single chamber leadless implantable medical device (LIMD) are provided. The method is under control of one or more processors in the LIMD configured with specific executable instructions. The method obtains a far field (FF) cardiac activity (CA) signals for activity in a remote chamber of a heart and compares the far field CA signals to a P-wave template to identify an event of interest associated with the remote chamber.Type: ApplicationFiled: May 29, 2019Publication date: December 3, 2020Inventors: Gene A. Bornzin, Nima Badie, Chunlan Jiang, David Ligon
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Publication number: 20200350737Abstract: A method, apparatus and system for coherent beam combining (CBC) in high energy fiber laser (HEL) systems include generating a reference interference pattern of a signal source including at least two single-mode optical signals, capturing and evaluating the reference interference pattern, maximizing an intensity of the selected area of the captured, reference interference pattern, increasing a linewidth of the optical signals generating the reference interference pattern until the reference interference pattern is degraded, and adjusting a delay time of one of the at least two single-mode optical signals until the reference interference pattern is recovered, by adjusting a value of a delay of a delayed RF signal with a broaden linewidth to a respective EO linewidth broadening modulator in at least one channel of the at least two single-mode optical signals while evaluating the interference pattern on a display device.Type: ApplicationFiled: May 1, 2019Publication date: November 5, 2020Inventors: Leonid A. Beresnev, Kristan P. Gurton, David A. Ligon, Anthony R. Valenzuela, Chatt C. Williamson
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Publication number: 20200086129Abstract: Embodiments described herein relate to implantable medical devices (IMDs) and methods for use therewith. Such a method includes using an accelerometer of an IMD (e.g., a leadless pacemaker) to produce one or more accelerometer outputs indicative of the orientation of the IMD. The method can also include controlling communication pulse parameter(s) of one or more communication pulses (produced by pulse generator(s)) based on accelerator output(s) indicative of the orientation of the IMD. The communication pulse parameter(s) that is/are controlled can be, e.g., communication pulse amplitude, communication pulse width, communication pulse timing, and/or communication pulse morphology. Such embodiments can be used to improve conductive communications between IMDs whose orientation relative to one another may change over time, e.g., due to changes in posture and/or due to cardiac motion over a cardiac cycle.Type: ApplicationFiled: October 25, 2018Publication date: March 19, 2020Inventors: XIAOYI MIN, DAVID LIGON, WEIQUN YANG, SHAWN CHEN, MATTHEW G. FISHLER
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Publication number: 20190392081Abstract: A system and method are provided for constructing query links which produces executable predefined hypertext links useful for mining data. Simple inputs (such as search terms) are converted into executable hypertext links. Searches can be automatically executed from the touch of a button or the like across multiple search engines and publicly accessible databases, from a centralized master console. The generated output code allows exhaustive internet searches to be performed in a remote automated manner quickly and easily through massive amounts of data with a high degree of accuracy. Furthermore, a complete end-to-end data mining solution is disclosed that includes processes that occur prior to construction of the query links as well as those that occur afterwards, including employing artificial intelligence techniques so as to return more meaningful and relevant data.Type: ApplicationFiled: June 21, 2018Publication date: December 26, 2019Inventor: David Ligon
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Publication number: 20170036017Abstract: A device and method is provided for biasing lung volume by electrically stimulating tissue associated with the diaphragm or phrenic nerve at a low level.Type: ApplicationFiled: June 14, 2016Publication date: February 9, 2017Applicant: RMX, LLCInventors: Amir J. TEHRANI, David LIGON, Chang Y. LEE, Rose PROVINCE, Amy M. GOODMAN
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Patent number: 9370657Abstract: A device and method is provided for biasing lung volume by electrically stimulating tissue associated with the diaphragm or phrenic nerve at a low level.Type: GrantFiled: June 27, 2011Date of Patent: June 21, 2016Assignee: RMX, LLCInventors: Amir J. Tehrani, David Ligon, Chang Lee, Rose Province, Amy Michelle Goodman
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Patent number: 9259573Abstract: A device and method is provided for increasing the functional residual capacity of lungs of a subject by electrically stimulating tissue associated with the diaphragm or phrenic nerve of the subject.Type: GrantFiled: November 10, 2005Date of Patent: February 16, 2016Assignee: RMX, LLCInventors: Amir J. Tehrani, David Ligon, Chang Lee, Rose Province, Amy Michelle Goodman
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Publication number: 20130296973Abstract: A device and method is provided for electrically stimulating the diaphragm to control breathing while inhibiting respiratory drive. A stimulation phase is identified. The stimulation phase is it period of time within the breathing cycle in which stimulation will inhibit respiratory drive. The respiratory drive inhibition may be used in a number of applications including but not limited to: improving or remodeling the heart in heart failure patients, treating apnea, chronic obstructive pulmonary disorder (COPD), and hypertension.Type: ApplicationFiled: March 26, 2013Publication date: November 7, 2013Inventors: Amir J. TEHRANI, David LIGON
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Patent number: 8412331Abstract: A device and method is provided for electrically stimulating the diaphragm to control breathing while inhibiting respiratory drive. A stimulation phase is identified. The stimulation phase is a period of time within the breathing cycle in which stimulation will inhibit respiratory drive. The respiratory drive inhibition may be used in a number of applications including but not limited to: improving or remodeling the heart in heart failure patients, treating apnea, chronic obstructive pulmonary disorder (COPD), and hypertension.Type: GrantFiled: October 15, 2004Date of Patent: April 2, 2013Assignee: RMX, LLCInventors: Amir J. Tehrani, David Ligon
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Patent number: 8335567Abstract: A device and method is provided for therapeutic stimulating, augmenting, manipulating and/or controlling breathing, in combination with stimulation of auxiliary respiratory nerves or muscles including the upper airway tract, chest wall muscles or abdominal muscles. Stimulation may be provided, for example, to augment breathing or to prevent closing of the upper airway during therapeutic stimulation. Stimulation may be also provided to the Hypoglossal nerve during exhalation.Type: GrantFiled: January 10, 2012Date of Patent: December 18, 2012Assignee: RMX, LLCInventors: Amir J. Tehrani, David Ligon, Chang Y. Lee, Rose Province, Amy M. Goodman