Location History:
- Albuquerque, NM (US) (1996 - 2001)
- Tempe, AZ (US) (2003 - 2012)
Company Filing History:
8 out of 20,290 
2 out of 2,928 
1 out of 5,491 
Years Active: 1996-2012
Title: **John C. Estes: Innovator in Tuned Filter Technology**
Introduction
John C. Estes, a notable inventor based in Tempe, AZ, has made significant contributions to the field of filter technology through his innovative patents. With a total of 11 patents to his name, Estes has established himself as a leading figure in the development of actively tuned filters that promise versatility and efficiency in various applications.
Latest Patents
Among his latest inventions, Estes is recognized for the following patents:
1. **Actively Tuned Filter** - This innovative filter provides a constant bandwidth across multiple frequencies. It features first and second electromagnetically coupled coiled resonators. Each resonator has an open end configured to receive an input and a shorted end that connects to the ground. A variable capacitance is incorporated, allowing the selection of capacitance applied to the resonators along a single axis.
2. **Tunable Filter Utilizing a Conductive Grid** - This tunable filter comprises a first and second resonator, along with a conductive grid assembly that alters the coupling between them. The conductive grid assembly includes a conductive grid element and a ground coupling element that adjusts the coupling to ground, enhancing the filter's performance.
Career Highlights
Throughout his career, John C. Estes has worked with well-known companies in the electronics industry, including Motorola Corporation and Rockwell Collins, Inc. His expertise and innovation have made a lasting impact on the development and improvement of electronic filter systems.
Collaborations
Estes has collaborated with notable professionals, including colleagues Anthony M. Pavio and Richard S. Kommrusch. These collaborations have contributed to enriching his research and supporting the advancement of filter technologies within the industry.
Conclusion
John C. Estes is a remarkable inventor whose work in actively tuned filter technology has set new standards in the field. His contributions continue to influence various applications in electronics, establishing him as a key figure among contemporary inventors. With a strong portfolio of patents, Estes demonstrates the potential for innovation in the ever-evolving landscape of technology.