Mitsumasa Okada

Title: Mitsumasa Okada: Magnetic Recording Head Inventor.

Introduction

Mitsumasa Okada is an inventor associated with Kawasaki, Japan, whose patent work focuses on magnetic heads and thin-film magnetic head design. His portfolio includes 6 patents, and his listed company affiliations include Fujitsu Corporation and Fujitsu Limited.

Latest Patents

Okada’s listed patents address magnetic head structures and manufacturing methods intended to improve recording performance.

“Magnetic Head and Method of Manufacturing the Same” describes a magnetic head with a narrow upper magnetic pole designed to limit side erasure and record bleeding. Its lower magnetic pole has grooves on both sides of the pole section, with the groove edges positioned below the upper face of the lower magnetic pole.

“Thin Film Magnetic Head and Method of Manufacturing the Same” describes a structure intended to reduce magnetic flux leakage and improve writing characteristics. It includes lower and upper magnetic pole layers, a gap layer, a sub-magnetic pole layer, and an insulating heaped layer with a sloped portion. The slope is designed so that its height gradually decreases toward the gap layer, while the end-face angle helps prevent flux leakage near the rear of the heaped layer.

Career Highlights

Okada’s listed work connects him with Fujitsu Corporation and Fujitsu Limited. The patent descriptions highlight his contributions to magnetic recording head designs, particularly features intended to improve writing performance and control unwanted recording effects.

Collaborations

His listed coworkers include Takashi Ito and Takamitsu Orimoto. Their names appear alongside Okada’s patent-related work.

Conclusion

Mitsumasa Okada’s patent portfolio reflects a focus on magnetic head engineering, with designs aimed at improving data recording and reducing unwanted magnetic effects.