This inventor holds 3 USPTO granted patents. Top assignees: Mitsubishi Materials Corporation, Railway Technical Research Institute, Fujikura Limited. Active years: 1992-1998.
Company Filing History:
2 out of 1,555 
2 out of 65 
1 out of 1,870 
Years Active: 1992-1998
Title: Sumihisa Aoki: Innovator in Electric Railway Technology
Introduction
Sumihisa Aoki 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
Aoki's latest patents include a wire for electric railways, which 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. If required, it may also contain 0.01 to 0.1% silicon, or a combination of 0.01 to 0.1% silicon and 0.001 to 0.05% magnesium, with the balance being copper and inevitable impurities. Another patent details a method for producing wire for electric railways, which involves hot working a copper alloy billet with a similar composition, followed by quenching, cold working, and aging treatment.
Career Highlights
Throughout his career, Aoki has worked with prominent organizations such as the Railway Technical Research Institute and Mitsubishi Materials Corporation. His expertise in materials science has led to innovations that enhance the efficiency and reliability of electric railway systems.
Collaborations
Aoki has collaborated with several professionals in his field, including Hiroki Nagasawa and Takuro Iwamura. Their joint efforts have contributed to advancements in railway technology.
Conclusion
Sumihisa Aoki's contributions to electric railway technology through his patents and collaborations highlight his role as an influential inventor in this specialized field. His work continues to impact the development of efficient railway systems.