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).

  • Patent number: 11944414
    Abstract: 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: Grant
    Filed: April 19, 2021
    Date of Patent: April 2, 2024
    Assignee: Verily Life Sciences LLC
    Inventor: Ravi Narasimhan
  • Publication number: 20240027687
    Abstract: 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: Application
    Filed: October 2, 2023
    Publication date: January 25, 2024
    Inventors: MARK WILLIAM KNIGHT, STEPHANIE ROXANE SANDOR-LEAHY, LAKSHMINARAYANAN RAVI NARASIMHAN
  • Patent number: 11868902
    Abstract: 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: Grant
    Filed: August 31, 2022
    Date of Patent: January 9, 2024
    Assignee: Optum, Inc.
    Inventor: Ravi Narasimhan
  • Patent number: 11835763
    Abstract: 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: Grant
    Filed: October 22, 2021
    Date of Patent: December 5, 2023
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Mark William Knight, Stephanie Roxane Sandor-Leahy, Lakshminarayanan Ravi Narasimhan
  • Patent number: 11744522
    Abstract: 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: Grant
    Filed: June 30, 2021
    Date of Patent: September 5, 2023
    Assignee: Vital Connect, Inc.
    Inventors: Nima Ferdosi, Ravi Narasimhan
  • Patent number: 11678811
    Abstract: 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: Grant
    Filed: October 18, 2019
    Date of Patent: June 20, 2023
    Assignee: Vital Connect, Inc.
    Inventors: Nima Ferdosi, Ravi Narasimhan, Alexander Chan
  • Publication number: 20230128056
    Abstract: 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: Application
    Filed: October 22, 2021
    Publication date: April 27, 2023
    Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: MARK WILLIAM KNIGHT, STEPHANIE ROXANE SANDOR-LEAHY, LAKSHMINARAYANAN RAVI NARASIMHAN
  • Patent number: 11607138
    Abstract: 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: Grant
    Filed: July 19, 2019
    Date of Patent: March 21, 2023
    Assignee: Vital Connect, Inc.
    Inventors: Nandakumar Selvaraj, Ravi Narasimhan
  • Publication number: 20230004818
    Abstract: 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: Application
    Filed: August 31, 2022
    Publication date: January 5, 2023
    Inventor: Ravi Narasimhan
  • Patent number: 11488027
    Abstract: 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: Grant
    Filed: February 21, 2020
    Date of Patent: November 1, 2022
    Assignee: Optum, Inc.
    Inventor: Ravi Narasimhan
  • Patent number: 11481417
    Abstract: 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: Grant
    Filed: November 6, 2019
    Date of Patent: October 25, 2022
    Assignee: ServiceNow, Inc.
    Inventors: Mitul Tiwari, Ravi Narasimhan Raj, Madhusudan Mathihalli, Kaushik Rangadurai, Srivatsava Daruru, Quaizar Vohra, Deepak Bobbarjung, Abhisaar Yadav
  • Patent number: 11468238
    Abstract: 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: Grant
    Filed: November 6, 2019
    Date of Patent: October 11, 2022
    Assignee: ServiceNow Inc.
    Inventors: Mitul Tiwari, Ravi Narasimhan Raj, Madhusudan Mathihalli, Kaushik Rangadurai, Srivatsava Daruru, Quaizar Vohra, Deepak Bobbarjung, Abhisaar Yadav
  • Patent number: 11455357
    Abstract: 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: Grant
    Filed: November 6, 2019
    Date of Patent: September 27, 2022
    Assignee: ServiceNow, Inc.
    Inventors: Mitul Tiwari, Ravi Narasimhan Raj, Madhusudan Mathihalli, Kaushik Rangadurai, Srivatsava Daruru, Quaizar Vohra, Deepak Bobbarjung, Abhisaar Yadav
  • Patent number: 11406305
    Abstract: 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: Grant
    Filed: June 29, 2018
    Date of Patent: August 9, 2022
    Assignee: Vital Connect, Inc.
    Inventors: Nandakumar Selvaraj, Ravi Narasimhan
  • Patent number: 11406328
    Abstract: 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: Grant
    Filed: February 26, 2019
    Date of Patent: August 9, 2022
    Assignee: Vital Connect, Inc.
    Inventors: Nima Ferdosi, Ravi Narasimhan
  • Patent number: 11394667
    Abstract: 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: Grant
    Filed: December 14, 2018
    Date of Patent: July 19, 2022
    Assignee: Rupert Labs, Inc.
    Inventors: Deepak Bobbarjung, Madhusudan Mathihalli, Mitul Tiwari, Kurt MacDonald, Ravi Narasimhan Raj
  • Patent number: 11324420
    Abstract: 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: Grant
    Filed: January 22, 2019
    Date of Patent: May 10, 2022
    Assignee: Vital Connect, Inc.
    Inventors: Nandakumar Selvaraj, Ravi Narasimhan
  • Patent number: 11278216
    Abstract: 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: Grant
    Filed: June 8, 2018
    Date of Patent: March 22, 2022
    Assignee: VITAL CONNECT, INC.
    Inventors: Alexander Chan, Nima Ferdosi, Ravi Narasimhan
  • Publication number: 20210393209
    Abstract: 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: Application
    Filed: June 30, 2021
    Publication date: December 23, 2021
    Inventors: Nima FERDOSI, Ravi NARASIMHAN
  • Publication number: 20210264289
    Abstract: 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: Application
    Filed: February 21, 2020
    Publication date: August 26, 2021
    Inventor: Ravi Narasimhan