1
Kenneth M Anderson, Dennis A Brumwell: Rate adaptive pacer. Medtronic, Robert C Beck, John L Rooney, Joseph F Breimayer, January 31, 1984: US04428378 (393 worldwide citation)

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.


2
Kenneth M Anderson, Dennis A Brumwell: Implantable dynamic pressure transducer system. Medtronic, Robert C Beck, John L Rooney, Joseph F Breimayer, December 4, 1984: US04485813 (293 worldwide citation)

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.


3
Alan A Moore, Dennis A Brumwell: Oxygen sensing pacemaker. Medtronic, Reed A Duthler, Joseph F Breimayer, John L Rooney, June 14, 1988: US04750495 (189 worldwide citation)

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 regu ...


4
Alan A Moore, Dennis A Brumwell: Oxygen sensing pacemaker. Medtronic, Reed A Duthler, Joseph F Breimayer, February 27, 1990: US04903701 (170 worldwide citation)

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 regu ...


5
Theodore P Adams, Dennis A Brumwell, Joseph S Perttu, Charles G Supino: Dual battery power system for an implantable cardioverter defibrillator. Angeion Corporation, Patterson & Keough, December 13, 1994: US05372605 (113 worldwide citation)

An improved dual battery power system uses two separate battery power sources for an implantable cardioverter defibrillator, each having optimized characteristics for monitoring functions and for output energy delivery functions, respectively. The monitoring functions are supplied electrical power b ...


6
Joseph S Perttu, Dennis A Brumwell, James E Brewer, Theodore P Adams: R-wave detection method for implantable cardioverter defibrillators. Angeion Corporation, Brad Pedersen, January 20, 1998: US05709215 (102 worldwide citation)

An ICD detection method for sensing the occurrence of an R-wave improves the ability to distinguish R-waves from noise through the use of variable declining sensitivity thresholds. The method includes the consideration of the amplitude of at least the previous most recent R-wave to determine a decli ...


7
Mark W Kroll, Theodore P Adams, Dennis A Brumwell: Implantable defibrillator system with capacitor switching circuitry. Angeion Corporation, Patterson & Keough, April 16, 1996: US05507781 (90 worldwide citation)

The present invention uses switches to set the topology and polarity of a circuit that includes capacitors to deliver an electric pulse to a heart during a defibrillation procedure. The waveform of the electric pulse is biphasic, in that it is a positive portion of the pulse followed by a negative p ...


8
Michael D Baudino, Michael D De Franco, Joseph F Lessar, Dennis A Brumwell, Gene A Bornzin, Jeffrey A Schweitzer: Oxygen sensing pacemaker. Medtronic, Reed A Duthler, Joseph F Breimayer, John L Rooney, February 28, 1989: US04807629 (58 worldwide citation)

A heart pacemaker including a two wave length reflectance oximeter for determining oxygen saturation. The pacing rate is increased or decreased in response to the measured oxygen saturation. By appropriate multiplexing and timing functions, the two wave length reflectance oximeter is included in a p ...


9
Michael D Baudino, Michael D de Franco, Joseph F Lessar, Dennis A Brumwell, Gene A Bornzin, Jeffrey A Schweitzer: Oxygen sensing pacemaker. Medtronic, Reed A Duthler, Joseph F Breimayer, John J Rooney, December 20, 1988: US04791935 (58 worldwide citation)

A heart pacemaker including a two wave length reflectance oximeter for determining oxygen saturation. The pacing rate is increased or decreased in response to the measured oxygen saturation. By appropriate multiplexing and timing functions, the two wave length reflectance oximeter is included in a p ...


10
Dennis A Brumwell, Joseph S Perttu, Mark W Kroll, Randall S Nelson: Shield for implantable cardioverter defibrillator. Angeion Corporation, Brad Pedersen, May 12, 1998: US05749910 (47 worldwide citation)

An implantable cardioverter defibrillator capable of subcutaneous positioning within a patient delivers at least one electrical cardioversion/defibrillation countershocks to the heart of the patient. The implantable cardioverter defibrillator includes a housing, circuitry positioned within the housi ...