This inventor holds 2 USPTO granted patents and 1 published patent application. Top assignee: Shell Oil Comapny. Active years: 1980.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 1980
Title: Innovations by John F Parrish
Introduction
John F Parrish is an accomplished inventor based in New Orleans, LA. He has made significant contributions to the field of seismic amplification technology. With a total of 2 patents to his name, Parrish has developed innovative solutions that enhance the performance of seismic survey equipment.
Latest Patents
Parrish's latest patents include the "Floating Shunt Seismic Amplifier" and the "Line Compensated Seismic Amplifier." The Floating Shunt Seismic Amplifier is a differential amplifier circuit that utilizes two operational amplifiers. This design allows for a low input impedance between the two input terminals while maintaining a high impedance between either input terminal and the common ground. This unique configuration provides many desirable characteristics of a transformer-coupled amplifier, including high common mode voltage rejection ratios, even in the presence of moderate differential imbalances.
The Line Compensated Seismic Amplifier is specifically designed for marine seismic survey work. It facilitates the transmission of signals from remote signaling stations over cable pairs to signal processing equipment. The amplifier incorporates operational amplifiers interconnected with a feedback circuit that consists of a balanced resistive-reactive network. This network serves as a lumped parameter equivalent circuit of the transmission line and capacitive transducer, ensuring a flat, zero-phase shift overall response.
Career Highlights
John F Parrish is currently employed at Shell Oil Company, where he applies his expertise in seismic technology. His work has significantly impacted the efficiency and effectiveness of seismic surveys, contributing to advancements in the field.
Collaborations
Parrish collaborates with fellow inventor Albert J Berni, working together to push the boundaries of seismic technology and innovation.
Conclusion
John F Parrish's contributions to seismic amplification technology through his patents demonstrate his innovative spirit and commitment to advancing the field. His work continues to influence marine seismic survey practices, showcasing the importance of invention in engineering.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile