Location History:
- Tokyo, JP (1994 - 2010)
- Tsuchiura, JP (2012 - 2015)
- Chiyoda-ku, JP (2015)
Company Filing History:
5 out of 21,351 
2 out of 15,942 
2 out of 2 
Years Active: 1994-2015
Title: Innovations of Katsumi Ohata
Introduction
Katsumi Ohata is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of superconductors and electrical machines. With a total of 11 patents to his name, Ohata's work reflects his dedication to advancing technology.
Latest Patents
One of his latest patents involves a precursor for a NbSn superconductor wire manufactured by the internal diffusion method. This invention includes a plurality of Nb-based single core wires, each featuring a Nb-based core coated with a Cu-based coating. Additionally, it comprises a plurality of Sn-based single core wires, each with a Sn-based core also coated with a Cu-based coating. The design incorporates a cylindrical diffusion barrier made of Ta or Nb, where the Nb-based and Sn-based single core wires are regularly disposed. Notably, the Nb-based single core wires have a Cu/Nb ratio of 0.4 or more, indicating a specific cross-sectional area ratio of the Cu-based coating to the Nb-based core.
Another significant invention by Ohata is a rotating electrical machine. This machine features a magnet holder made of a non-magnetic material, designed to retain a permanent magnet in a circumferential direction. The holder includes engaging portions that lock with the magnet cover and an extending portion that maintains a clearance with the inner peripheral surface of the magnet cover.
Career Highlights
Katsumi Ohata has worked with notable companies such as Mitsubishi Denki Kabushiki Kaisha and Mitsubishi Electric Corporation. His experience in these organizations has contributed to his expertise in the field of electrical engineering and superconductors.
Collaborations
Ohata has collaborated with esteemed colleagues, including Toshinori Tanaka and Keiichi Fukazawa. Their joint efforts have furthered advancements in their respective fields.
Conclusion
Katsumi Ohata's innovative contributions to superconductors and electrical machines highlight his role as a leading inventor in Japan. His patents reflect a commitment to technological advancement and collaboration within the industry.