Company Filing History:
2 out of 1,530 
2 out of 65 
1 out of 1,803 
Years Active: 1992-1998
Title: Hiroki Nagasawa: Innovator in Electric Railway Technology
Introduction
Hiroki Nagasawa is a notable inventor based in Kokubunji, Japan. He has made significant contributions to the field of electric railway technology, holding a total of 3 patents. His work focuses on the development of advanced materials for electric railway systems.
Latest Patents
Nagasawa's latest patents include innovative designs for wires used in electric railways. One of his patents describes a wire that comprises a copper alloy consisting essentially, by weight percent, of 0.1 to 1.0% chromium, 0.01 to 0.3% zirconium, 0.05 to 0.15% tin, and 10 ppm or less oxygen. This wire may also contain additional elements such as silicon and magnesium, with the balance being copper and inevitable impurities. Another patent outlines a method for producing this wire, which involves hot working a copper alloy billet, quenching it, cold working the element wire, and subjecting it to aging treatment.
Career Highlights
Throughout his career, Hiroki Nagasawa has worked with prominent companies in the industry. He has been associated with Mitsubishi Materials Corporation and the Railway Technical Research Institute, where he has contributed to various projects and innovations.
Collaborations
Nagasawa has collaborated with notable coworkers, including Sumihisa Aoki and Motoo Goto. Their combined expertise has further advanced the development of electric railway technologies.
Conclusion
Hiroki Nagasawa's contributions to electric railway technology through his patents and collaborations highlight his role as an influential inventor in this field. His innovative approaches continue to shape the future of railway systems.