Patents by Inventor Peter John D. Wickham, deceased

Peter John D. Wickham, deceased 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).

  • Respiratory apparatus with improved flow-flattening detection
    Patent number: 7013893
    Abstract: In a respiratory apparatus for treatment of sleep apnea and other disorders associated with an obstruction of a patient's airway and which uses an airflow signal, an obstruction index is generated which detects the flattening of the inspiratory portion of the airflow. The obstruction index is used to differentiate normal and obstructed breathing. The obstruction index is based upon different weighting factors applied to sections of the airflow signal thereby improving sensitivity to various types of respiration obstructions.
    Type: Grant
    Filed: September 27, 2004
    Date of Patent: March 21, 2006
    Assignee: ResMed Limited
    Inventors: Nicola Frances Wickham, legal representative, Peter John D. Wickham, deceased