Location History:
- Fukuoka, JP (1998)
- Kitakyusyu, JP (1998)
- Kitakyushu, JP (1985 - 2010)
- Tokyo, JP (2011 - 2022)
Company Filing History:
15 out of 3,562 
3 out of 15 Years Active: 1985-2022
Title: Tomoji Kumano - Innovator in Electrical Steel Technology
Introduction
Tomoji Kumano, based in Tokyo, Japan, is a distinguished inventor with an impressive portfolio of 15 patents. His work primarily focuses on advancements in electrical steel technology, which plays a critical role in various electrical applications.
Latest Patents
Among his notable recent inventions is a grain-oriented electrical steel sheet designed with exceptional magnetic characteristics. This invention features a unique metallographic structure that includes matrix grains with Goss-oriented secondary recrystallized grains. The design ensures an optimal frequency of Goss-oriented crystal grains, contributing to a magnetic flux density of at least 1.88 T. Additionally, the deviation angles from the rolling direction are carefully maintained to enhance performance.
Another significant patent involves the manufacturing method of this specialized grain-oriented electrical steel sheet. The process begins with heating a slab at precise temperatures to create a solid solution inhibiting substance. Following that, the slab undergoes hot-rolling, annealing, and cold-rolling, complemented by nitriding treatment in a mixed gas environment to form a secondary inhibitor. The process highlights Kumano's comprehensive approach to enhancing the properties of electrical steel.
Career Highlights
Kumano's professional journey includes pivotal roles at prominent companies, including Nippon Steel Corporation and Nittetsu Plant Designing Corporation. His contributions in these firms have significantly propelled advancements in the field of electrical steel manufacturing.
Collaborations
Throughout his career, Kumano has collaborated with notable professionals, including Osamu Tanaka and Norikazu Fujii. These partnerships have facilitated innovative research and the development of cutting-edge technologies in electrical steel.
Conclusion
Tomoji Kumano's dedication to innovation in electrical steel technology has made him a respected figure in the industry. His 15 patents are a testament to his commitment to enhancing the magnetic properties and manufacturing processes of electrical steel, ensuring its continued relevance in modern applications.