Location History:
- Osaka, JP (1987)
- Mishima, JP (1987 - 1993)
Company Filing History:
1 out of 1 
1 out of 26 
1 out of 1 Years Active: 1987-1993
Title: Innovations by Youichi Ohnishi
Introduction
Youichi Ohnishi is a notable inventor based in Mishima, Japan. He has made significant contributions to the field of magnetic field generating devices, particularly for medical imaging technologies. With a total of 3 patents to his name, Ohnishi's work has advanced the capabilities of MRI and NMR-CT systems.
Latest Patents
One of Ohnishi's latest patents is a magnetic field generating device specifically designed for MRI applications. This device generates magnetic fields within an air gap and includes a pair of permanent magnet assemblies positioned opposite each other. The design incorporates yokes for magnetically linking the assemblies and magnetic pole pieces fixed to the air-gap-confronting surfaces. This innovative construction allows for increased magnetic field intensities by strategically placing magnetic material segments or permanent magnet segments on the confronting surfaces.
Another significant patent by Ohnishi is a magnetic field generating device for nuclear magnetic resonance-computerized tomography (NMR-CT). This device features permanent magnet assemblies that define an air gap and are magnetically coupled by yoke means. Each assembly consists of a central flat plate-like permanent magnet surrounded by peripheral magnets that are inclined towards the air gap. This design reduces leakage flux and enhances magnetic efficiency, leading to a reduction in the device's dimensions and weight.
Career Highlights
Ohnishi has worked with prominent companies such as Sumitomo Special Metal Co., Ltd. and Sumitomo Special Metal Co. Ltd. His experience in these organizations has contributed to his expertise in developing advanced magnetic field technologies.
Collaborations
Throughout his career, Ohnishi has collaborated with notable colleagues, including Hideya Sakurai and Toshinobu Miyamoto. These partnerships have likely fostered innovation and the exchange of ideas in the field of magnetic technologies.
Conclusion
Youichi Ohnishi's contributions to the field of magnetic field generating devices have significantly impacted medical imaging technologies. His innovative patents demonstrate a commitment to advancing the capabilities of MRI and NMR-CT systems. Ohnishi's work continues to influence the industry and pave the way for future innovations.