Location History:
- Campbell, CA (US) (2007 - 2010)
- Los Gatos, CA (US) (2012 - 2016)
Company Filing History:
6 out of 2,075 
4 out of 6,260 
Years Active: 2007-2025
Title: **John Douglas Marshall: Innovator in Medical Imaging Technology**
Introduction
John Douglas Marshall is a prominent inventor based in Campbell, California, with an impressive portfolio of 9 patents primarily focused on advancements in medical imaging technology. His work has significantly influenced the field of ultrasound imaging, making diagnostic procedures more efficient and effective.
Latest Patents
Among his latest contributions, Marshall has patented an innovative ultrasound imaging system that incorporates bias circuitry and methods of making and using the technology. This medical imaging system integrates an imaging device designed for insertion into the lumen of a catheter, featuring an ultrasound transducer coupled with bias circuitry that enhances the transducer's performance. Furthermore, the system utilizes at least one communication line that transmits both a transducer drive signal and a charge signal, optimizing its functionality with different frequencies.
Another remarkable patent focuses on layer switching for an ultrasound transducer array. This invention enables a multi-layer transducer to operate effectively, using only one system channel per element. By employing passive switching, the design facilitates different configurations for transmitting and receiving signals, allowing for improved performance through varying operational modes.
Career Highlights
Marshall has been associated with esteemed companies like Siemens Medical Solutions USA, Inc. and Boston Scientific Scimed, Inc., where he has contributed his expertise to develop cutting-edge imaging solutions. His work in these organizations has played a vital role in shaping modern medical imaging technologies.
Collaborations
Throughout his career, John has collaborated with several talented individuals, including Bhaskar S Ramamurthy and Jan-Ulco Kluiwstra. Together, they have worked on projects that pushed the boundaries of ultrasound technology and have paved the way for future innovations in the medical field.
Conclusion
John Douglas Marshall stands out as a visionary inventor whose work continues to advance the field of medical imaging. Through his patents and collaborations, he has made significant strides that enhance diagnostic capabilities, ultimately benefiting healthcare practitioners and patients alike. His dedication to innovation exemplifies the impact that inventors can have on society.
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.