Miyagi, Japan

Seiji Kumagai


Average Co-Inventor Count = 3.0

ph-index = 5

Forward Citations = 93(Granted Patents)


Company Filing History:


Years Active: 1995-2012

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13 patents (USPTO):Explore Patents

Title: The Innovative Contributions of Seiji Kumagai in Magnetic Technologies

Introduction: Seiji Kumagai, a prominent inventor based in Miyagi, Japan, has made significant advancements in the field of magnetic technology. With 13 patents to his name, his work primarily focuses on the development and enhancement of magnetic tape technologies which are vital in various data storage applications.

Latest Patents: Kumagai's recent patents include groundbreaking inventions such as a magnetic tape, a magnetic tape apparatus, and a servo pattern recording apparatus. His innovative magnetic tape features a data band that incorporates servo patterns, data, and a guard space. The servo patterns are strategically formed along the longitudinal direction of the tape, with intervals separating each pattern, enabling efficient data recording. Additionally, he developed a magnetic resistance element designed with four magnetization states and a magnetic device that employs this technology. This element includes an upper magnetic layer in contact with an anti-ferromagnetic layer and is engineered to change its combined resistance based on applied magnetic field patterns.

Career Highlights: Kumagai has established himself as an integral part of Sony Corporation, where he continues to push the boundaries of magnetic technologies. His research and patents have not only contributed to the advancement of data storage solutions but have also enhanced the overall performance of magnetic devices in consumer electronics.

Collaborations: Throughout his career, Kumagai has collaborated with notable colleagues in his field, including Yoshito Ikeda and Junichi Honda. These partnerships have furthered innovation and have been instrumental in his successful patent applications.

Conclusion: Seiji Kumagai's dedication to innovation in magnetic technology has resulted in significant contributions that enhance data storage capabilities across industries. His patents not only reflect his expertise but also highlight the importance of collaboration in fostering advancements in technology. As he continues his work at Sony Corporation, the impact of his inventions will likely influence future developments in the field.

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