Patents by Inventor Curtis R. Hafner

Curtis R. Hafner 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).

  • Cardiac monitoring method and apparatus
    Patent number: 5333617
    Abstract: A patient monitoring system includes a plurality of leads adapted to be coupled to a patient for generating individual ECG data voltage signals. A switching matrix couples the leads to a plurality of differential circuits for coupling selected pairs of the ECG voltage signals to each of the differential circuits for generating differential ECG vector signals functionally related to the difference between selected pairs of the ECG voltage signals. A microprocessor is coupled to the leads and to the switching matrix and is operative to reset the switching matrix to uncouple one or more first leads from the differential circuits and for coupling one or more different ones of the ECG voltage signals to differential circuit formerly coupled to receive the voltage signal from the one or more first leads.
    Type: Grant
    Filed: April 12, 1991
    Date of Patent: August 2, 1994
    Assignee: Marquette Electronics, Inc.
    Inventor: Curtis R. Hafner
  • Cardiac monitoring method and apparatus
    Patent number: 5025808
    Abstract: A patient monitoring system includes a plurality of leads adapted to be coupled to a patient for generating individual ECG data voltage signals. A switching matrix couples the leads to a plurality of differential circuits for coupling selected pairs of the ECG voltage signals to each of the differential circuits for generating differential ECG vector signals functionally related to the difference between selected pairs of the ECG voltage signals. A microprocessor is coupled to the leads and to the switching matrix and is operative to reset the switching matrix to uncouple one or more first leads from the differential circuits and for coupling one or more different ones of the ECG voltage signals to differential circuit formerly coupled to receive the voltage signal from the one or more first leads.
    Type: Grant
    Filed: January 31, 1990
    Date of Patent: June 25, 1991
    Assignee: Marquette Electronics, Inc.
    Inventor: Curtis R. Hafner
  • Cardiac monitoring method and apparatus
    Patent number: 5022404
    Abstract: A patient monitoring system includes a plurality of leads adapted to be coupled to a patient for generating individual ECG data voltage signals. A switching matrix couples the leads to a plurality of differential circuits for coupling selected pairs of the ECG voltage signals to each of the differential circuits for generating differential ECG vector signals functionally related to the difference between selected pairs of the ECG voltage signals. A microprocessor is coupled to the leads and to the switching matrix and is operative to reset the switching matrix to uncouple one or more first leads from the differential circuits and for coupling one or more different ones of the ECG voltage signals to differential circuit formerly coupled to receive the voltage signal from the one or more first leads.
    Type: Grant
    Filed: October 16, 1989
    Date of Patent: June 11, 1991
    Assignee: Marquette Electronics. Inc.
    Inventor: Curtis R. Hafner