Company Filing History:
1 out of 44 
3 out of 832,761 Years Active: 1978-1984
Title: The Innovative Mind of Duane Marshall: Revolutionizing Industries with Patents in Lexington, MA
Introduction: Duane Marshall is a visionary inventor based in Lexington, MA. With a total of 4 patents under his belt, Marshall has consistently pushed the boundaries of innovation in various industries.
Latest Patents:
1. Slug rejector: Marshall's invention of a slug rejector showcases his expertise in coin-operated mechanisms. By utilizing a coin-testing oscillator alongside a reference oscillator, Marshall ensured precise and stable operation, revolutionizing the field of coin validation technology.
2. Bottom margin indicator apparatus for typewriters and the like: Marshall's advancements in typewriter technology are evident in this patent. By implementing an optical sensor-monitor system, Marshall effectively eliminated spurious effects, offering a more accurate bottom-edge margin indication for enhanced user experience.
Career Highlights: Marshall's innovative spirit has led him to work with notable companies such as the Academy of Applied Science. His contributions have significantly impacted the fields of technology and automation, cementing his reputation as a forward-thinker in the industry.
Collaborations: Throughout his career, Marshall has collaborated with esteemed individuals like Robert H Rines and Carol M Rines. Together, they have tackled complex challenges and devised groundbreaking solutions that have reshaped the technological landscape.
Conclusion: Duane Marshall's remarkable journey as an inventor is a testament to his unwavering commitment to innovation. His patents and collaborations have left an indelible mark on various industries, inspiring future generations of inventors to push the boundaries of what is possible.