Company Filing History:
3 out of 8,033 
1 out of 4,992 
Years Active: 1982-1996
Title: John W Frech: Innovator in Identification Systems and Digital-to-Analog Converters
Introduction
John W Frech is a notable inventor based in Baltimore, MD (US), recognized for his contributions to technology with a total of 4 patents. His work primarily focuses on identification systems and digital-to-analog converters, showcasing his expertise in electrical engineering and innovation.
Latest Patents
Frech's latest patents include an "Identification system and method with passive tag." This invention features a reading device equipped with a single turn transmission coil that continuously radiates alternating energy. A portable tag receives energy from the reader through magnetic coupling, charging a storage capacitor to 5 volts. The capacitor discharges rapidly during a time period shorter than the charging time, powering a coded information transmission circuit for a small percentage of the duty cycle. Another significant patent is the "Digital-to-analog converter," which addresses the transition effects of more significant bits in the D/A converter reference of an A/D converter. This apparatus connects a pair of D/A converters in tandem to eliminate the transition of more significant bits at half scale. Additionally, three D/A converters are connected in parallel, each offset from one another to minimize the effect of bit transition, resulting in a smoother analog output.
Career Highlights
Throughout his career, John W Frech has worked with prominent organizations, including Westinghouse Electric Corporation and the United States of America as represented by the Secretary of the Air Force. His experience in these esteemed institutions has contributed significantly to his development as an inventor and innovator.
Collaborations
Frech has collaborated with notable individuals in his field, including Benjamin F Weigand and David F Everett. These partnerships have likely enriched his work and expanded the impact of his inventions.
Conclusion
John W Frech's innovative contributions to identification systems and digital-to-analog converters highlight his significant role in advancing technology. His patents reflect a commitment to improving electronic systems and enhancing functionality in various applications.