Location History:
- Bristol, RI (US) (2014)
- St. Petersburg, FL (US) (2014 - 2018)
- Plymouth, MA (US) (2017 - 2019)
- Bourne, MA (US) (2020)
Company Filing History:
7 out of 1,067 
2 out of 1,930 
Years Active: 2014-2020
Title: The Innovative Contributions of John E. Grandfield
Introduction: John E. Grandfield is a prolific inventor based in St. Petersburg, Florida, known for his remarkable contributions to the field of engineering with a total of seven patents to his name. His innovations reflect a deep understanding of advanced technologies and a commitment to enhancing the functionality of various electronic devices.
Latest Patents: Among his latest patents is the "Switchable Active Balanced-to-Unbalanced Phase Shifter." This advanced phase shifter enables 360° phase shifts and incorporates an active balanced-to-unbalanced circuit designed to split an input signal into two signals that are offset in phase. Additionally, it features an active all-pass network that is electrically linked to the output of the active balun circuit, including a tunable inductor and a variable-gain amplifier for enhanced performance. Moreover, Grandfield holds a patent for a "Frequency Selective Surface Antenna Element." This innovative antenna design is tailored to achieve a reduced radar cross-section without the need for a radar-mitigating radome. The design employs frequency selective surfaces capable of minimizing radar signal reflection, with some embodiments offering electrical tunability for dynamic frequency adjustment.
Career Highlights: John E. Grandfield has a distinguished career that includes significant experiences at The Charles Stark Draper Laboratory, Inc. and the University of South Florida. His work in these esteemed institutions has facilitated advancements in various electronics applications and has paved the way for further innovative explorations.
Collaborations: Throughout his career, Grandfield has collaborated with notable professionals, including Michael P. Abban and Thomas McCrea Weller. These partnerships have contributed to the development of his patents and innovations, showcasing the importance of teamwork in driving technological progress.
Conclusion: John E. Grandfield is a dedicated inventor whose significant contributions to the field of electronics are evidenced by his numerous patents. His innovative spirit and collaborative efforts have not only advanced technology but have also set a benchmark for future inventors in the industry. His work continues to inspire innovation and creativity among engineers and inventors alike.
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.