Patents by Inventor Ravi Narasimhan
Ravi Narasimhan 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: 11944414Abstract: A finger-wearable blood pressure monitor device includes a cuff, a tactile sensor array, and control circuitry. The tactile sensor array is disposed on or adjacent to an inward facing surface of the cuff. The tactile sensor array includes a plurality of sensors. The control circuitry is coupled to the tactile sensor array and includes logic that when executed by the control circuitry causes the finger-wearable blood pressure monitoring device to perform operations. The operations include monitoring, over a first time period, a pressure applied to each of the plurality of sensors by a digital artery of a finger. The operations also include generating a plurality of tactile waveforms in response to monitoring the pressure. Each of the plurality of tactile waveforms corresponds to the pressure applied to a respective one of the plurality of sensors over the first time period. The operations further include estimating blood pressure based, at least in part, on the plurality of tactile waveforms.Type: GrantFiled: April 19, 2021Date of Patent: April 2, 2024Assignee: Verily Life Sciences LLCInventor: Ravi Narasimhan
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Publication number: 20240027687Abstract: A method of making a photonic integrated circuit (PIC) is provided. The method comprises depositing a functional resist material layer over a substrate, disposing and pressing a stamp with a plurality of nanopatterns into the functional resist material for a period of time, and removing the stamp from the functional resist material to provide nanofeatures that are inverted versions of the nanopatterns, wherein the nanofeatures form one or more optical elements.Type: ApplicationFiled: October 2, 2023Publication date: January 25, 2024Inventors: MARK WILLIAM KNIGHT, STEPHANIE ROXANE SANDOR-LEAHY, LAKSHMINARAYANAN RAVI NARASIMHAN
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Patent number: 11868902Abstract: There is a need for more effective and efficient data evaluation. This need can be addressed by, for example, techniques for data evaluation in accordance with a shared decision tree data object. In one example, a method includes generating, using a plurality of feature extraction threads, shared evidentiary data; generating, based on a selected shared evidentiary data subset of the shared evidentiary data that correspond to one or more selected nodes of the shared decision tree data object, refined evidentiary data; processing the refined evidentiary data in accordance with the shared decision tree data object to generate an evaluation output and an explanation output; and displaying an evaluation output user interface comprising user interface data describing the evaluation output and the explanation output.Type: GrantFiled: August 31, 2022Date of Patent: January 9, 2024Assignee: Optum, Inc.Inventor: Ravi Narasimhan
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Patent number: 11835763Abstract: A method of making a photonic integrated circuit (PIC) is provided. The method comprises depositing a functional resist material layer over a substrate, disposing and pressing a stamp with a plurality of nanopatterns into the functional resist material for a period of time, and removing the stamp from the functional resist material to provide nanofeatures that are inverted versions of the nanopatterns, wherein the nanofeatures form one or more optical elements.Type: GrantFiled: October 22, 2021Date of Patent: December 5, 2023Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATIONInventors: Mark William Knight, Stephanie Roxane Sandor-Leahy, Lakshminarayanan Ravi Narasimhan
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Patent number: 11744522Abstract: A method and system for assessing an electrocardiogram (ECG) signal quality are disclosed. In a first aspect, the method comprises determining a Kurtosis calculation of the ECG signal and determining whether the Kurtosis calculation satisfies a first threshold to continuously assess the ECG signal quality. In a second aspect, the system comprises a wireless sensor device coupled to a user via at least one electrode, wherein the wireless sensor device includes a processor and a memory device coupled to the processor, wherein the memory device stores an application which, when executed by the processor, causes the processor to determine a Kurtosis calculation of the ECG signal and to determine whether the Kurtosis calculation satisfies a first threshold to continuously assess the ECG signal quality.Type: GrantFiled: June 30, 2021Date of Patent: September 5, 2023Assignee: Vital Connect, Inc.Inventors: Nima Ferdosi, Ravi Narasimhan
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Patent number: 11678811Abstract: A method and system for contextual heart rate monitoring are disclosed. In a first aspect, the method comprises calculating a heart rate using a detected ECG signal and detecting an activity level. In a second aspect, the system comprises a wireless sensor device coupled to a user via at least one electrode, wherein the wireless sensor device includes a processor and a memory device coupled to the processor, wherein the memory device stores an application which, when executed by the processor, causes the processor to calculate a heart rate using a detected ECG signal and to detect an activity level.Type: GrantFiled: October 18, 2019Date of Patent: June 20, 2023Assignee: Vital Connect, Inc.Inventors: Nima Ferdosi, Ravi Narasimhan, Alexander Chan
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Publication number: 20230128056Abstract: A method of making a photonic integrated circuit (PIC) is provided. The method comprises depositing a functional resist material layer over a substrate, disposing and pressing a stamp with a plurality of nanopatterns into the functional resist material for a period of time, and removing the stamp from the functional resist material to provide nanofeatures that are inverted versions of the nanopatterns, wherein the nanofeatures form one or more optical elements.Type: ApplicationFiled: October 22, 2021Publication date: April 27, 2023Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATIONInventors: MARK WILLIAM KNIGHT, STEPHANIE ROXANE SANDOR-LEAHY, LAKSHMINARAYANAN RAVI NARASIMHAN
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Patent number: 11607138Abstract: A method and system for determining a respiratory rate of a user using an electrocardiogram (ECG) segment of the user are disclosed. The method comprises decomposing the ECG segment into a plurality of functions and evaluating the plurality of functions to choose one of the plurality of functions based on a respiratory band power. The method includes determining the respiratory rate using the one of the plurality of functions and a domain detection.Type: GrantFiled: July 19, 2019Date of Patent: March 21, 2023Assignee: Vital Connect, Inc.Inventors: Nandakumar Selvaraj, Ravi Narasimhan
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Publication number: 20230004818Abstract: There is a need for more effective and efficient data evaluation. This need can be addressed by, for example, techniques for data evaluation in accordance with a shared decision tree data object. In one example, a method includes generating, using a plurality of feature extraction threads, shared evidentiary data; generating, based on a selected shared evidentiary data subset of the shared evidentiary data that correspond to one or more selected nodes of the shared decision tree data object, refined evidentiary data; processing the refined evidentiary data in accordance with the shared decision tree data object to generate an evaluation output and an explanation output; and displaying an evaluation output user interface comprising user interface data describing the evaluation output and the explanation output.Type: ApplicationFiled: August 31, 2022Publication date: January 5, 2023Inventor: Ravi Narasimhan
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Patent number: 11488027Abstract: There is a need for more effective and efficient data evaluation. This need can be addressed by, for example, techniques for data evaluation in accordance with a shared decision tree data object. In one example, a method includes generating, using a plurality of feature extraction threads, shared evidentiary data; generating, based on a selected evidentiary data subset of the shared evidentiary data that correspond to one or more selected nodes of the shared decision tree data object, refined evidentiary data; processing the refined evidentiary data in accordance with the shared decision tree data object to generate an evaluation output and an explanation output; and displaying an evaluation output user interface comprising user interface data describing the evaluation output and the explanation output.Type: GrantFiled: February 21, 2020Date of Patent: November 1, 2022Assignee: Optum, Inc.Inventor: Ravi Narasimhan
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Patent number: 11481417Abstract: Example data processing systems and methods are described. In one implementation, a system accesses a corpus of data and analyzes the data contained in the corpus of data to identify multiple documents. The system generates vector indexes for the multiple documents such that the vector indexes allow a computing system to quickly access the plurality of documents and identify an answer to a question associated with the corpus of data.Type: GrantFiled: November 6, 2019Date of Patent: October 25, 2022Assignee: ServiceNow, Inc.Inventors: Mitul Tiwari, Ravi Narasimhan Raj, Madhusudan Mathihalli, Kaushik Rangadurai, Srivatsava Daruru, Quaizar Vohra, Deepak Bobbarjung, Abhisaar Yadav
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Patent number: 11468238Abstract: Example data processing systems and methods are described. In one implementation, a system accesses a corpus of data and analyzes the data contained in the corpus of data to identify multiple documents. The system generates vector indexes for the multiple documents such that the vector indexes allow a computing system to quickly access the plurality of documents and identify an answer to a question associated with the corpus of data.Type: GrantFiled: November 6, 2019Date of Patent: October 11, 2022Assignee: ServiceNow Inc.Inventors: Mitul Tiwari, Ravi Narasimhan Raj, Madhusudan Mathihalli, Kaushik Rangadurai, Srivatsava Daruru, Quaizar Vohra, Deepak Bobbarjung, Abhisaar Yadav
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Patent number: 11455357Abstract: Example data processing systems and methods are described. In one implementation, a system accesses a corpus of data and analyzes the data contained in the corpus of data to identify multiple documents. The system generates vector indexes for the multiple documents such that the vector indexes allow a computing system to quickly access the plurality of documents and identify an answer to a question associated with the corpus of data.Type: GrantFiled: November 6, 2019Date of Patent: September 27, 2022Assignee: ServiceNow, Inc.Inventors: Mitul Tiwari, Ravi Narasimhan Raj, Madhusudan Mathihalli, Kaushik Rangadurai, Srivatsava Daruru, Quaizar Vohra, Deepak Bobbarjung, Abhisaar Yadav
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Patent number: 11406305Abstract: A method and system for determining a signal quality metric of a cardiovascular time series utilizing a wireless sensor device are disclosed. In a first aspect, the method comprises determining subsequent values of the cardiovascular time series and comparing the determined subsequent values to a threshold value. In a second aspect, a wireless sensor device comprises a processor and a memory device coupled to the processor, wherein the memory device includes an application that, when executed by the processor, causes the processor to determine subsequent values of the cardiovascular time series and compare the determined subsequent values to a threshold value.Type: GrantFiled: June 29, 2018Date of Patent: August 9, 2022Assignee: Vital Connect, Inc.Inventors: Nandakumar Selvaraj, Ravi Narasimhan
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Patent number: 11406328Abstract: A method and system for low-distortion denoising of an ECG signal are disclosed. The method comprises determining at least one beat of the ECG signal for denoising using a beat selection logic and denoising the at least one beat using at least one ensemble averaging filter. The system includes a sensor to detect the ECG signal, a processor coupled to the sensor, wherein the processor includes a beat selection logic unit, and a memory device coupled to the processor, wherein the memory device includes an application that, when executed by the processor, causes the processor to determine at least one beat of the ECG signal for denoising using a beat selection logic and to denoise the at least one beat using at least one ensemble averaging filter.Type: GrantFiled: February 26, 2019Date of Patent: August 9, 2022Assignee: Vital Connect, Inc.Inventors: Nima Ferdosi, Ravi Narasimhan
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Patent number: 11394667Abstract: Example systems and methods related to chatbot skills are described. In one implementation, a system initiates a session to create a new chatbot. The system receives a selection of a first chatbot skill associated with the new chatbot and a selection of a second chatbot skill associated with the new chatbot, where the first chatbot skill is different from the second chatbot skill. The system creates the new chatbot by importing the first chatbot skill and the second chatbot skill into the new chatbot.Type: GrantFiled: December 14, 2018Date of Patent: July 19, 2022Assignee: Rupert Labs, Inc.Inventors: Deepak Bobbarjung, Madhusudan Mathihalli, Mitul Tiwari, Kurt MacDonald, Ravi Narasimhan Raj
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Patent number: 11324420Abstract: A method and system for sleep apnea detection are disclosed. The method comprises detecting at least one respiratory signal and utilizing a detection algorithm to automatically detect at least one sleep apnea event from the at least one respiratory signal. The system includes a sensor to determine at least one respiratory signal, a processor coupled to the sensor, and a memory device coupled to the processor, wherein the memory device includes a detection algorithm and an application that, when executed by the processor, causes the processor to utilize the detection algorithm to automatically determine at least one sleep apnea event from the at least one respiratory signal.Type: GrantFiled: January 22, 2019Date of Patent: May 10, 2022Assignee: Vital Connect, Inc.Inventors: Nandakumar Selvaraj, Ravi Narasimhan
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Patent number: 11278216Abstract: A method and wireless sensor device for determining step count is disclosed. In one aspect, a method includes receiving sensor data. The method includes detecting if there is activity of the body based on the sensor data. If there is activity, the method also includes classifying the activity and determining step count based on classification of the activity.Type: GrantFiled: June 8, 2018Date of Patent: March 22, 2022Assignee: VITAL CONNECT, INC.Inventors: Alexander Chan, Nima Ferdosi, Ravi Narasimhan
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Publication number: 20210393209Abstract: A method and system for assessing an electrocardiogram (ECG) signal quality are disclosed. In a first aspect, the method comprises determining a Kurtosis calculation of the ECG signal and determining whether the Kurtosis calculation satisfies a first threshold to continuously assess the ECG signal quality. In a second aspect, the system comprises a wireless sensor device coupled to a user via at least one electrode, wherein the wireless sensor device includes a processor and a memory device coupled to the processor, wherein the memory device stores an application which, when executed by the processor, causes the processor to determine a Kurtosis calculation of the ECG signal and to determine whether the Kurtosis calculation satisfies a first threshold to continuously assess the ECG signal quality.Type: ApplicationFiled: June 30, 2021Publication date: December 23, 2021Inventors: Nima FERDOSI, Ravi NARASIMHAN
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Publication number: 20210264289Abstract: There is a need for more effective and efficient data evaluation. This need can be addressed by, for example, techniques for data evaluation in accordance with a shared decision tree data object. In one example, a method includes generating, using a plurality of feature extraction threads, shared evidentiary data; generating, based on a selected evidentiary data subset of the shared evidentiary data that correspond to one or more selected nodes of the shared decision tree data object, refined evidentiary data; processing the refined evidentiary data in accordance with the shared decision tree data object to generate an evaluation output and an explanation output; and displaying an evaluation output user interface comprising user interface data describing the evaluation output and the explanation output.Type: ApplicationFiled: February 21, 2020Publication date: August 26, 2021Inventor: Ravi Narasimhan