Location History:
- Marina del Rey, CA (US) (2002 - 2003)
- Los Angeles, CA (US) (2006 - 2007)
Company Filing History:
2 out of 5,182 
1 out of 3 
1 out of 832,812 Years Active: 2002-2007
Title: Innovations of John D Evans
Introduction
John D Evans is a notable inventor based in Los Angeles, CA, with a total of four patents to his name. His work primarily focuses on advancements in medical devices and plasma generation technologies.
Latest Patents
One of his latest patents is a device for manipulating a needle or abrader array and method of use. This invention relates to an apparatus and method for intradermally administering a pharmaceutical composition or other substances into and through the skin of a mammalian body. It aims to avoid or eliminate the excess pain and discomfort typically caused by microabraders or microneedles entering the epithelial layers beneath the stratum corneum. In a preferred embodiment, the apparatus is a microdevice featuring an array of microabraders or microneedles along with a manipulating member.
Another significant patent is the plasma production device and method, which includes an RF driver circuit. This invention discloses an RF driver circuit and an orthogonal antenna assembly/configuration as part of a method and system for generating high-density plasma. The antenna assembly is designed to be driven by any RF generator or circuitry with suitable impedance matching to present a low impedance. The disclosed RF driver circuit utilizes switching type amplifier elements and presents a low output impedance, eliminating the need for a matching circuit for interfacing with the inherent impedance variations associated with plasma.
Career Highlights
Throughout his career, John D Evans has worked with reputable companies, including Becton Dickinson and Company Limited. His contributions to the field of medical devices and plasma technology have been significant, showcasing his innovative spirit and technical expertise.
Collaborations
John has collaborated with notable individuals in his field, including Alexander George Lastovich and Ronald J Pettis. Their combined efforts have contributed to the advancement of technologies that improve medical procedures and plasma generation.
Conclusion
John D Evans is a distinguished inventor whose work has made a substantial impact in the fields of medical devices and plasma technology. His innovative patents reflect his commitment to enhancing the quality of life through technological advancements.