Patents by Inventor Roshy Stan Mathew

Roshy Stan Mathew 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).

  • Over-voltage protection circuit
    Patent number: 8363370
    Abstract: An over-voltage protection circuit is disclosed herein for protection against over-voltage of an energy storage device while charging. The circuit operates within the operational limits of a battery-operated device, such as a mobile or handheld device. The over-voltage protection circuit comprises an over-voltage protection device, and an over-voltage protection controller. The controller allows current to flow to the over-voltage protection device only when an energy storage device is experiencing over-voltage. In allowing current to flow to the over-voltage protection device only when the voltage across the energy storage device is above a predetermined voltage, power conservation is achieved.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: January 29, 2013
    Assignee: Research In Motion Limited
    Inventors: Andrew D. Shiner, Carl D. Schaaff, Richard C. Madter, Roshy Stan Mathew, Michael F. Habicher, Quang A. Luong
  • OVER-VOLTAGE PROTECTION CIRCUIT
    Publication number: 20120039008
    Abstract: An over-voltage protection circuit is disclosed herein for protection against over-voltage of an energy storage device while charging. The circuit operates within the operational limits of a battery-operated device, such as a mobile or handheld device. The over-voltage protection circuit comprises an over-voltage protection device, and an over-voltage protection controller. The controller allows current to flow to the over-voltage protection device only when an energy storage device is experiencing over-voltage. In allowing current to flow to the over-voltage protection device only when the voltage across the energy storage device is above a predetermined voltage, power conservation is achieved.
    Type: Application
    Filed: October 25, 2011
    Publication date: February 16, 2012
    Applicant: Research In Motion Limited
    Inventors: Andrew D. Shiner, Carl D. Schaaff, Richard C. Madter, Roshy Stan Mathew, Michael F. Habicher, Quang A. Luong
  • Over-voltage protection circuit
    Patent number: 8072724
    Abstract: An over-voltage protection circuit is disclosed herein for protection against over-voltage of an energy storage device while charging. The circuit operates within the operational limits of a battery-operated device, such as a mobile or handheld device. The over-voltage protection circuit comprises an over-voltage protection device, and an over-voltage protection controller. The controller allows current to flow to the over-voltage protection device only when an energy storage device is experiencing over-voltage. In allowing current to flow to the over-voltage protection device only when the voltage across the energy storage device is above a predetermined voltage, power conservation is achieved.
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: December 6, 2011
    Assignee: Research In Motion Limited
    Inventors: Andrew D. Shiner, Carl D. Schaaff, Richard C. Madter, Roshy Stan Mathew, Michael F. Habicher, Quang A. Luong
  • OVER-VOLTAGE PROTECTION CIRCUIT
    Publication number: 20110148362
    Abstract: An over-voltage protection circuit is disclosed herein for protection against over-voltage of an energy storage device while charging. The circuit operates within the operational limits of a battery-operated device, such as a mobile or handheld device. The over-voltage protection circuit comprises an over-voltage protection device, and an over-voltage protection controller. The controller allows current to flow to the over-voltage protection device only when an energy storage device is experiencing over-voltage. In allowing current to flow to the over-voltage protection device only when the voltage across the energy storage device is above a predetermined voltage, power conservation is achieved.
    Type: Application
    Filed: March 2, 2011
    Publication date: June 23, 2011
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Andrew D. Shiner, Carl D. Schaaff, Richard C. Madter, Roshy Stan Mathew, Michael F. Habicher, Quang A. Luong
  • Over-voltage protection circuit
    Patent number: 7948727
    Abstract: An over-voltage protection circuit is disclosed herein for protection against over-voltage of an energy storage device while charging. The circuit operates within the operational limits of a battery-operated device, such as a mobile or handheld device. The over-voltage protection circuit comprises an over-voltage protection device, and an over-voltage protection controller. The controller allows current to flow to the over-voltage protection device only when an energy storage device is experiencing over-voltage. In allowing current to flow to the over-voltage protection device only when the voltage across the energy storage device is above a predetermined voltage, power conservation is achieved.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: May 24, 2011
    Assignee: Research In Motion Limited
    Inventors: Andrew D. Shiner, Carl D. Schaaff, Richard C. Madter, Roshy Stan Mathew, Michael F. Habicher, Quang A. Luong
  • OVER-VOLTAGE PROTECTION CIRCUIT
    Publication number: 20090213512
    Abstract: An over-voltage protection circuit is disclosed herein for protection against over-voltage of an energy storage device while charging. The circuit operates within the operational limits of a battery-operated device, such as a mobile or handheld device. The over-voltage protection circuit comprises an over-voltage protection device, and an over-voltage protection controller. The controller allows current to flow to the over-voltage protection device only when an energy storage device is experiencing over-voltage.
    Type: Application
    Filed: May 7, 2009
    Publication date: August 27, 2009
    Applicant: Research In Motion Limited
    Inventors: Andrew D. Shiner, Carl D. Schaaff, Richard C. Madter, Roshy Stan Mathew, Michael F. Habicher, Quang A. Luong
  • Over-voltage protection circuit
    Patent number: 7035070
    Abstract: An over-voltage protection circuit is disclosed herein for protection against over-voltage of an energy storage device while charging. The circuit operates within the operational limits of a battery-operated device, such as a mobile or handheld device. The over-voltage protection circuit comprises an over-voltage protection device, and an over-voltage protection controller. The controller allows current to flow to the over-voltage protection device only when an energy storage device is experiencing over-voltage. In allowing current to flow to the over-voltage protection device only when the voltage across the energy storage device is above a predetermined voltage, power conservation is achieved.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: April 25, 2006
    Assignee: Research In Motion Limited
    Inventors: Andrew D. Shiner, Carl D. Schaaff, Richard C. Madter, Roshy Stan Mathew, Michael F. Habicher, Quang A. Luong
  • Over-voltage protection circuit
    Publication number: 20030076642
    Abstract: An over-voltage protection circuit is disclosed herein for protection against over-voltage of an energy storage device while charging. The circuit operates within the operational limits of a battery-operated device, such as a mobile or handheld device. The over-voltage protection circuit comprises an over-voltage protection device, and an over-voltage protection controller. The controller allows current to flow to the over-voltage protection device only when an energy storage device is experiencing over-voltage.
    Type: Application
    Filed: September 30, 2002
    Publication date: April 24, 2003
    Inventors: Andrew D. Shiner, Carl D. Schaaff, Richard C. Madter, Roshy Stan Mathew, Michael F. Habicher, Quang A. Luong