Robert B Johnston

Title: The Innovations of Robert B Johnston

Introduction

Robert B Johnston is an accomplished inventor based in Petaluma, CA (US). He has made significant contributions to the field of telecommunications, particularly with his innovative patent that enhances the functionality of telephone lines.

Latest Patents

Robert B Johnston holds a patent for an "Added Main Line Apparatus." This invention provides a system that allows two telephone lines to operate over a single conductor pair. The design includes a ring generator with two transistor bridges, each responsible for the ringing signal on separate subscriber lines. The alternating current for the ringing signal is generated by turning on diagonally opposed pairs of transistors in alternation. This system also features comparators for off-hook detection during the ringing cycle, ensuring that customer equipment can be monitored effectively.

Career Highlights

Robert is currently employed at Lightlogic, Inc., where he continues to develop innovative solutions in telecommunications. His work has been instrumental in advancing the technology used in telephone systems, making them more efficient and reliable.

Collaborations

Robert has collaborated with notable colleagues, including James L Fry and Larry Martin. Their combined expertise has contributed to the successful development of various projects within the company.

Conclusion

Robert B Johnston's contributions to telecommunications through his patent and work at Lightlogic, Inc. highlight his role as a significant innovator in the field. His inventions continue to impact the way telephone services are delivered, showcasing the importance of innovation in technology.