Company Filing History:
2 out of 16 
1 out of 832,912 Years Active: 1985-2000
Title: The Innovative Contributions of Marshall H Hollimon
Introduction
Marshall H Hollimon is a notable inventor based in Cupertino, CA, who has made significant contributions to the field of cable television technology. With a total of three patents to his name, Hollimon's work focuses on enhancing the quality and efficiency of data transmission in cable systems. His inventions are designed to improve user experience while maintaining high signal integrity.
Latest Patents
Hollimon's latest patents include a "TV and data cable system ingress noise blocker." This invention allows for the upstream transmission of short packets of information in a cable TV system while effectively blocking upstream noise at all other times. It achieves this without interfering with the image quality of normal TV viewing. The invention features a remotely operable ingress noise blocking filter that is strategically placed at the junction between a subscriber's coaxial drop cable and a corresponding feeder tap. This filter contains a high pass filter to allow normal TV signals to pass while isolating switching elements to prevent interference in the downstream TV band.
Another significant patent is the "upstream ingress noise blocking filter for cable television system." This invention employs a series of intelligently-controlled frequency-domain filters that connect each household node to the cable. These filters block ingress energy in the upstream band when no upstream signals are present and respond to energy produced by injected upstream signals to allow information signals to pass. The active switch mechanism used in this invention is designed to respond quickly to microvolt level signals, ensuring efficient operation without the need for an external power supply.
Career Highlights
Throughout his career, Hollimon has worked with various companies, including Com21, Inc. His experience in the industry has allowed him to develop innovative solutions that address common challenges in cable television systems. His patents reflect a deep understanding of the technical requirements for maintaining high-quality signal transmission.
Collaborations
Hollimon has collaborated with notable figures in the industry, including Paul Baran and George K Bunya. These partnerships have contributed to the development of his innovative technologies and have helped advance the field of cable television.
Conclusion
Marshall H Hollimon's contributions to cable television technology through his innovative patents demonstrate his commitment to improving data transmission quality. His work continues to influence the industry and enhance user experiences in cable systems.