Company Filing History:
1 out of 4,084 
1 out of 832,966 Years Active: 1989-1998
Title: Innovations by John Menken in Cardiac Technology
Introduction
John Menken is an accomplished inventor based in Champlin, MN (US). He has made significant contributions to the field of cardiac technology, holding a total of 2 patents. His work focuses on improving the functionality and efficiency of defibrillation and pacing devices.
Latest Patents
Menken's latest patents include a "Constant charge time of defibrillation capacitor" and a "Method and apparatus for cardioverter/pacer featuring a blanked pacing." The first patent describes a capacitor charging circuit that ensures a defibrillation capacitor is charged in a constant period, regardless of battery voltage. This is achieved through a controlled duty cycle charging technique, utilizing a transistor and flyback transformer circuit. The charging process occurs incrementally, allowing the capacitor to reach the predetermined voltage effectively.
The second patent outlines an implantable cardioverter/pacer that features a pacer channel and a rate detect channel. This device monitors cardiac signals and issues pacing signals when necessary. The automatic gain control in the rate detect channel adjusts the amplifier's gain based on the cardiac signal level, ensuring accurate detection of low-level signals that may indicate certain ventricular arrhythmias. After a brief blanking period, the microprocessor determines the appropriate treatment for the heart.
Career Highlights
Throughout his career, John Menken has worked with notable companies, including Cardiac Pacemakers, Inc. His innovative designs and patents have contributed to advancements in cardiac care, enhancing patient outcomes and device reliability.
Collaborations
Menken has collaborated with professionals in the field, including his coworker Paul Monroe. Their combined expertise has fostered the development of cutting-edge cardiac technologies.
Conclusion
John Menken's contributions to cardiac technology through his patents and collaborations have significantly impacted the medical field. His innovative approaches continue to pave the way for advancements in patient care and device functionality.