1
Frederik H M Wittkampf, Kornelis A M Mensink, Hendrik L Brouwer: Rate adaptive pacemaker and method of cardiac pacing. Vitatron Medical, Woodcock Washburn Kurtz Mackiewicz & Norris, December 15, 1981: US04305396 (66 worldwide citation)

An improved automatically rate adaptive pacemaker, wherein the rate of delivered stimulus pulses is controlled as a function of sensed hearbeat characteristics and/or patient threshold. The pacemaker analyzes different characteristics or parameters of the detected heartbeat signal, and the rate of d ...


2
Guillaume L M Cals, Frederik H M Wittkampf, Kornelis A Mensink, Hendrik L Brouwer: Pacemaker output circuit. Vitafin, Woodcock Washburn Kurtz Mackiewicz & Norris, August 10, 1982: US04343312 (62 worldwide citation)

A physiological stimulating system includes improved means for minimizing the polarization that results at the stimulus site, thereby enabling enhanced detection of evoked responses. In the pacemaker embodiment, the stimulus signal comprises positive recharge pulses immediately before and immediatel ...


3
Frederik H M Wittkampf, Kornelis A Mensink, Hendrik L Brouwer: Apparatus for physiological stimulation and detection of evoked response. Vitafin, Woodcock Washburn Kurtz Mackiewicz & Norris, February 15, 1983: US04373531 (53 worldwide citation)

A physiological stimulating system includes improved means for minimizing the polarization that results at the stimulus site, thereby enabling enhanced detection of evoked responses. In the pacemaker embodiment, the stimulus signal comprises positive recharge pulses immediately before and immediatel ...


4
Kornelis A Mensink, Hendrik L Brouwer: Pacemaker with switchable circuits and method of operation of same. Vitafin, Woodcock Washburn Kurtz Mackiewicz & Norris, May 19, 1987: US04665919 (26 worldwide citation)

A device such as a cardiac pacemaker or other implantable biomedical device, and method of operation thereof, containing one or more switchable circuits. A control system, preferably incorporating a microprocessor, controls predetermined changes of the operating characteristics of the switchable cir ...


5
Kornelis A Mensink, Hendrik L Brouwer: CMOS Circuits with parameter adapted voltage regulator. Vitafin, Woodcock Washburn Kurtz Mackiewicz & Norris, July 30, 1985: US04532467 (9 worldwide citation)

A self-adjusting voltage regulator circuit on a CMOS chip, for use with CMOS digital and/or analog circuit, providing a voltage which is selected in accordance with the characteristics of the chip to optimally current control operation of CMOS circuits on this chip. The voltage regulator circuit has ...


6
Kornelis A Mensink, Hendrik L Brouwer: Monolithic pacemaker utilizing I.sup.2 L circuitry. Vitatron Medical, Woodcock Washburn Kurtz Mackiewicz & Norris, August 25, 1981: US04285345 (6 worldwide citation)

A monolithic pacer is provided which utilizes I.sup.2 L circuitry in combination with linear transistors, providing the conventional advantages of analog circuitry together with the flexibility of digital circuitry. Low current drain operation is achieved by current source control of circuit operati ...