Patents by Inventor David C. Kale

David C. Kale 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).

  • Wrist-worn pulse transit time sensor
    Patent number: 10709383
    Abstract: A wrist-worn device heart-monitoring device is presented. The wrist-worn heart-monitoring device includes a radial tonometer configured to output a pressure signal indicating a pulse pressure wave at a user's wrist, two or more electrodes configured to output an electrical signal indicating a user's heart has been commanded to contract, and a microphone configured to output an audio signal indicating a closing of a user's aortic valve. The wrist-worn heart-monitoring device further includes a pulse transit time monitor configured to calculate a pre-ejection period of the user's heart based on at least the pressure, electrical, and audio signals, and calculate a pulse transit time based on at least the pre-ejection period, the pressure signal, and the electrical signal.
    Type: Grant
    Filed: June 25, 2015
    Date of Patent: July 14, 2020
    Assignee: MICROSOFT TECHNOLOGY LICNESING, LLC
    Inventors: Daniel Morris, Desney S. Tan, T. Scott Saponas, Shwetak N. Patel, Nicolas Villar, Gregory R. Smith, Sidhant Gupta, Gabriel Adam Cohn, David C. Kale, Sailaja Malladi, Ronald E. Paulsen
  • WRIST-WORN PULSE TRANSIT TIME SENSOR
    Publication number: 20160287172
    Abstract: A wrist-worn device heart-monitoring device is presented. The wrist-worn heart-monitoring device includes a radial tonometer configured to output a pressure signal indicating a pulse pressure wave at a user's wrist, two or more electrodes configured to output an electrical signal indicating a user's heart has been commanded to contract, and a microphone configured to output an audio signal indicating a closing of a user's aortic valve. The wrist-worn heart-monitoring device further includes a pulse transit time monitor configured to calculate a pre-ejection period of the user's heart based on at least the pressure, electrical, and audio signals, and calculate a pulse transit time based on at least the pre-ejection period, the pressure signal, and the electrical signal.
    Type: Application
    Filed: June 25, 2015
    Publication date: October 6, 2016
    Inventors: Daniel Morris, Desney S. Tan, T. Scott Saponas, Shwetak N. Patel, Nicolas Villar, Gregory R. Smith, Sidhant Gupta, Gabriel Adam Cohn, David C. Kale, Sailaja Malladi, Ronald E. Paulsen