Patents by Inventor Dennis A. Brumwell

Dennis A. Brumwell 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).

  • Oxygen sensing pacemaker
    Patent number: 4750495
    Abstract: A demand pacemaker which regulates its pacing rate based upon sensed oxygen saturation percentage. The pacemaker employs a two wavelength reflectance oximeter as a sensor. The sensor includes an oscillator which sequentially activates red and infrared diodes. The duty cycle of the oscillator is regulated by the relative amounts of red and infrared light reflected by the blood. The construction of the sensor allows the sensor to operate with only two conductors, optimizing it for incorporation in a standard, bipolar pacing lead.
    Type: Grant
    Filed: June 5, 1987
    Date of Patent: June 14, 1988
    Assignee: Medtronic, Inc.
    Inventors: Alan A. Moore, Dennis A. Brumwell
  • Implantable dynamic pressure transducer system
    Patent number: 4485813
    Abstract: Pressure and motion transducer, and cooperating circuitry for an implantable medical device is disclosed. The system includes a clock for the pulse excitation of a dynamic motion transducer and further includes circuitry for recovering the modulated signal from the transducer.
    Type: Grant
    Filed: November 19, 1981
    Date of Patent: December 4, 1984
    Assignee: Medtronic, Inc.
    Inventors: Kenneth M. Anderson, Dennis A. Brumwell
  • Rate adaptive pacer
    Patent number: 4428378
    Abstract: An activity sensor mounted within the pacer detects the general activity level of the patient and alters the escape interval of the pacer between a preset minimum and maximum in response to the detected activity level of the patient.
    Type: Grant
    Filed: November 19, 1981
    Date of Patent: January 31, 1984
    Assignee: Medtronic, Inc.
    Inventors: Kenneth M. Anderson, Dennis A. Brumwell