Location History:
- Rochester, MN (US) (1997 - 2001)
- Longmont, CO (US) (1998 - 2018)
Company Filing History:
10 out of 719 
8 out of 164,108 
4 out of 8,679 
Years Active: 1997-2018
Title: The Innovative Mind of John Charles Purkett
Introduction
John Charles Purkett, an accomplished inventor based in Longmont, CO, has made significant contributions in the field of technology and engineering. With an impressive portfolio of 22 patents, Purkett has developed innovative solutions that address complexities in electric motors and data storage systems.
Latest Patents
Among his latest patents, Purkett has designed a system for torque disturbance cancellation for an electric motor. This inventive circuit adjusts correction signals for each phase of the motor based on its rotational position, generating a distorted waveform to effectively drive the motor. By leveraging back electromotive force (BEMF) and measuring parameters such as cogging torque, his invention aims to reduce or eliminate motor vibrations and acoustic emissions.
Another remarkable patent involves writable servo overlap zones for disc memory systems. This technology transpires through a controller that determines servo gate timing for overlap zones comprised of servo patterns from two super zones. By initiating writing based on calculated timing and minimizing trajectory errors, Purkett’s work enhances the performance and reliability of disc memory.
Career Highlights
John Charles Purkett's professional journey has seen him employed at prominent companies, including Maxtor Corporation and the International Business Machines Corporation (IBM). His experience in these organizations has not only enriched his knowledge but also provided a platform to develop and test his groundbreaking inventions.
Collaborations
Throughout his illustrious career, Purkett has collaborated with notable engineers and inventors, including Bruce A. Liikanen and Richard Greenberg. These partnerships have helped refine his ideas and ensure the successful implementation of his patented technologies.
Conclusion
John Charles Purkett stands out as a prolific inventor whose innovations continue to impact the fields of motor control systems and data storage technologies. His dedication to solving engineering challenges is reflected in his patents, showcasing a career driven by creativity and technical prowess. As technology advances, the contributions of visionary inventors like Purkett will undoubtedly pave the way for future innovations.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.