Company Filing History:
Years Active: 1983-1999
Title: Akira Kumagai: Innovator in Magnetic Technology
Introduction
Akira Kumagai is a prominent inventor based in Hitachi, Japan. He has made significant contributions to the field of magnetic technology, holding a total of 5 patents. His work focuses on advancements in magnetic transducers and recording devices, showcasing his expertise and innovative spirit.
Latest Patents
Kumagai's latest patents include a magnetic transducer and a magnetic recording device utilizing a unique material. The magnetic laminated film used for the transducer is constructed with a ferromagnetic film made of a Ni–Fe alloy, formed on a glass substrate. An antiferromagnetic film, made of a Cr alloy, is laminated on the top layer, enhancing the device's performance. Another notable patent is for a magnetic disc apparatus that features a magnetic head with a magneto-resistance effect. This apparatus is designed for noiseless, high-output reproduction, utilizing a magnetic domain control structure that applies a longitudinally biasing magnetic field to improve recording density and stability.
Career Highlights
Kumagai is associated with Hitachi, Ltd., a leading company in technology and innovation. His work has significantly impacted the development of magnetic recording technologies, making him a key figure in this field.
Collaborations
Throughout his career, Kumagai has collaborated with notable coworkers, including Shinji Narishige and Takao Imagawa. These partnerships have contributed to the advancement of his research and innovations.
Conclusion
Akira Kumagai's contributions to magnetic technology through his patents and collaborations highlight his role as an influential inventor. His work continues to shape the future of magnetic recording devices and transducers.