Fumihiro Tokunaga

Title: Fumihiro Tokunaga: Innovator in Magnetic Recording Technology

Introduction

Fumihiro Tokunaga is a prominent inventor based in Kanagawa, Japan. He has made significant contributions to the field of magnetic recording technology, holding a total of 5 patents. His work has been instrumental in advancing the capabilities of magnetic recording media.

Latest Patents

Tokunaga's latest patents include innovative designs for magnetic recording media. One of his notable inventions is a magnetic recording medium that comprises a nonmagnetic support with a magnetic layer containing a binder and ferromagnetic particles. The binder in this invention includes a vinyl chloride resin, a phenoxy resin, a polycarbonate polyurethane resin, and a polyisocyanate. Additionally, this magnetic layer incorporates at least one lubricating agent selected from polyalkylene oxide alkyl phosphate, an alkali salt thereof, and lecithin. Another patent features a magnetic recording medium with a nonmagnetic support and a magnetic layer that consists of ferromagnetic particles dispersed in a binder made from a mixture of polycarbonate polyurethane and phenoxy resin, with a specific weight ratio.

Career Highlights

Fumihiro Tokunaga is currently associated with Fuji Photo Film Company, Limited, where he continues to innovate in the field of magnetic recording technology. His expertise and dedication have led to advancements that benefit various applications in the industry.

Collaborations

Throughout his career, Tokunaga has collaborated with notable colleagues, including Jun Nakagawa and Tsutomu Okita. These partnerships have fostered a creative environment that encourages innovation and the development of cutting-edge technologies.

Conclusion

Fumihiro Tokunaga's contributions to magnetic recording technology exemplify his commitment to innovation. His patents reflect a deep understanding of materials and engineering, positioning him as a key figure in the industry.