Company Filing History:
1 out of 8 
1 out of 832,843 Years Active: 2014-2020
Title: **Innovative Contributions of John M. Sprainis in Firearm and Railcar Design**
Introduction
John M. Sprainis, an inventive mind hailing from Springfield, Oregon, has made significant strides in the engineering of firearm technology and railcar design. With a total of two patents to his name, he has demonstrated a commitment to solving engineering challenges through innovative solutions.
Latest Patents
Among John M. Sprainis's notable patents is the "Shoulder-fired firearm primary and secondary recoil attenuator." This device is designed to mount on the butt of a shoulder-fired firearm and effectively absorb both primary and secondary recoil impulses through distinct engineering techniques. It includes a mount plate that attaches to the firearm's butt, with additional components like a shoulder plate and dampers made from a viscoelastic copolymer elastomer material which can adaptively respond to recoil forces.
His second patent is the "Elastomeric draft gear for a railcar." This invention involves a draft gear assembly featuring an elastomeric spring stack that is carefully engineered with compressible elastomeric springs. Each spring incorporates features like a rigid member in contact with the elastomeric pad and a uniquely designed abutment for enhanced performance and durability in railcar applications.
Career Highlights
John's career includes experience with Wabtec Corporation, where he applied his innovative approaches to complex engineering challenges. His work at Wabtec has contributed to advancements in both the rail and aerospace industries.
Collaborations
Throughout his career, John collaborated with notable colleagues, including Ronald J. Sprainis and Peter Paul Gregar. Together, they have fostered an environment of creativity and innovation, leading to the development of cutting-edge technologies.
Conclusion
John M. Sprainis's impact on the fields of firearm technology and railcar design illustrates his dedication to innovation. With his patents, he continues to push the boundaries of engineering, enhancing safety and performance in both industries. His work inspires future inventors to explore new frontiers in technology and design.