This inventor holds 3 USPTO granted patents. Top assignees: The United States of America as Represented by the United States, Martin Marietta Energy Systems, Inc.. Active years: 1987-1993.
Company Filing History:
2 out of 3,975 
1 out of 266 
Years Active: 1987-1993
Title: The Innovative Contributions of Daniel J Hoffman
Introduction
Daniel J Hoffman is a notable inventor based in Oak Ridge, TN (US). He has made significant contributions to the field of radio frequency technology, holding a total of 3 patents. His work focuses on methods and apparatuses that enhance the efficiency and effectiveness of ceramic sintering and plasma applications.
Latest Patents
Hoffman's latest patents include a "Method and apparatus for radio frequency ceramic sintering." This invention utilizes radio frequency energy to sinter ceramic materials, employing a coaxial waveguide resonator to produce a TEM mode wave. This wave generates a high field capacitive region where the ceramic sample is placed. The frequency of the power source is maintained between 60-80 MHz, allowing for precise control over the sintering process. An alternative embodiment features a tunable radio frequency circuit that includes a series input capacitor and a parallel capacitor, enabling impedance matching across various dielectric constants and ceramic volumes.
Another significant patent is the "Impedance matched, high-power, rf antenna for ion cyclotron resonance." This invention describes a resonant double loop radio frequency antenna designed to radiate high-power rf energy into magnetically confined plasma. The design incorporates an inductive element, forming the radiating element, which is connected between two variable capacitors to create a resonant circuit. This configuration allows for real input impedance and substantial reductions in voltage and current within the transmission system, enhancing the overall efficiency of the antenna.
Career Highlights
Throughout his career, Daniel J Hoffman has worked with esteemed organizations, including the United States of America as represented by the United States and Martin Marietta Energy Systems, Inc. His innovative work has contributed to advancements in radio frequency applications and materials science.
Collaborations
Hoffman has collaborated with notable colleagues such as Thomas L Owens and Frederick W Baity. Their combined expertise has furthered the development of technologies in their respective fields.
Conclusion
Daniel J Hoffman is a distinguished inventor whose work in radio frequency technology has led to significant advancements in ceramic sintering and plasma applications. His contributions continue to influence the field and inspire future innovations.