Patents by Inventor Erno H. Klaassen

Erno H. Klaassen 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: 20170340209
    Abstract: The present invention provides non-invasive devices, methods, and systems for determining a pressure of blood within a cardiovascular system of a user, the cardiovascular system including a heart and the user having a wrist covered by skin. More particularly, the present invention discloses a variety of wrist-worn devices having a variety of sensors configured to non-invasively engage the skin on the wrist of the user for sensing a variety of user signals from the cardiovascular system of the user. Generally, approaches disclosed herein may passively track blood pressure values without any interaction required on the part of the user or may allow for on demand or point measurements of blood pressure values by having a user actively interact with the sensors of the wrist-worn device.
    Type: Application
    Filed: August 18, 2017
    Publication date: November 30, 2017
    Inventors: Erno H. Klaassen, Wren Nancy Dougherty, Richard C. Kimoto, Ravi Narasimhan, Thomas J. Sullivan, Stephen J. Waydo, Todd K. Whitehurst, Santiago Quijano, Derek Park-Shing Young, Zijing Zeng
  • Publication number: 20170293727
    Abstract: In some implementations, a user device can assist a user with intelligent blood pressure monitoring. For example, the user device can present notifications and/or reminders that prompt the user to take blood pressure measurements at a prescribed time or according to a prescribed schedule. The user device can automatically determine that the user should or should not take a blood pressure measurement based on the user's context and suggest an alternative time for taking the blood pressure measurement. For example, the user's context can include the user's physical and/or psychological state inferred based on sensor data, application data, and/or other detectable information. In some implementations, the user device can automatically monitor the user's blood pressure and take blood pressure measurements based on user context triggers.
    Type: Application
    Filed: April 8, 2016
    Publication date: October 12, 2017
    Inventors: Erno H. KLAASSEN, Thomas J. SULLIVAN, Stuart L. GALLANT, Michael O'REILLY, Zijing ZENG, Gracee AGRAWAL
  • Patent number: 9726922
    Abstract: A sensing device can be included in a display of an electronic device. Various techniques can be used to reduce display noise in the signals output from the sensing device. The techniques include the use of a filtering layer in a display stack, the use of a non-uniform sampling scheme, averaging together noise signal samples sampled over multiple display frames, and inverting a phase of the sampling of the noise signal over multiple display frames.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: August 8, 2017
    Assignee: Apple Inc.
    Inventors: Manu Agarwal, Erno H. Klaassen, Hopil Bae, Kingsuk Brahma
  • Patent number: 7403147
    Abstract: A digital capacitor array with individually shielded unit capacitors and combination binary—thermometer coded addressing is disclosed. Such a capacitor array may be part of a digitally controlled oscillator in a MEMS-based frequency reference.
    Type: Grant
    Filed: November 29, 2006
    Date of Patent: July 22, 2008
    Assignee: SiTime Corporation
    Inventor: Erno H. Klaassen
  • Publication number: 20080122670
    Abstract: A digital capacitor array with individually shielded unit capacitors and combination binary—thermometer coded addressing is disclosed. Such a capacitor array may be part of a digitally controlled oscillator in a MEMS-based frequency reference.
    Type: Application
    Filed: November 29, 2006
    Publication date: May 29, 2008
    Inventor: Erno H. Klaassen
  • Patent number: 5600174
    Abstract: Temperature-sensitive transducers and other circuitry are manufactured by an electrochemical post-processing etch on an integrated circuit fabricated using a conventional CMOS process. Tetramethyl ammonium hydroxide or another anisotropic etchant having similar characterisics is used to selectively etch exposed front-side regions of a p-type silicon substrate, leaving n-type wells suspended from oxide beams. Circuits in the n-wells are thermally and electrically insulated from the substrate.
    Type: Grant
    Filed: October 11, 1994
    Date of Patent: February 4, 1997
    Assignee: The Board of Trustees of the Leeland Stanford Junior University
    Inventors: Richard J. Reay, Erno H. Klaassen