This inventor holds 4 USPTO granted patents. Top assignees: Sumitomo Metal Mining Company, Ltd., Sumitomo Special Metals Co., Ltd.. Active years: 1977-1994.
Location History:
- Ichikawa, JA (1977)
- Ichikawa, JP (1990)
- Niihama, JP (1987 - 1994)
Company Filing History:
4 out of 898 
1 out of 240 Years Active: 1977-1994
Title: Yasuhiro Okajima: Innovator in Rare Earth Materials
Introduction
Yasuhiro Okajima is a notable inventor based in Niihama, Japan. He has made significant contributions to the field of materials science, particularly in the development of rare earth-iron-boron based permanent magnets. With a total of 4 patents to his name, Okajima's work has had a substantial impact on various technological applications.
Latest Patents
Among his latest patents, Okajima has developed a powder material for rare earth-iron-boron based permanent magnets. This innovative powder is designed for producing permanent magnets and comprises a blend of specific powders. Additionally, he has created an alloy target for manufacturing a magneto-optical recording medium. This alloy target includes 10 to 50 atom % of at least one rare earth element, such as Sm, Nd, Gd, Tb, Dy, Ho, Tm, and Er, with the balance consisting of transition metals like Co, Fe, and Ni. The alloy features a mixed structure composed of at least three phases of intermetallic compounds formed by the rare earth element and the transition metal.
Career Highlights
Throughout his career, Yasuhiro Okajima has worked with prominent companies in the industry. He has been associated with Sumitomo Metal Mining Company, Ltd. and Sumitomo Special Metals Co., Ltd. These experiences have allowed him to refine his expertise and contribute to significant advancements in material science.
Collaborations
Okajima has collaborated with notable colleagues, including Yasuhiro Tsugita and Kaname Takeya. These partnerships have fostered innovation and have been instrumental in the development of new technologies in their field.
Conclusion
Yasuhiro Okajima's contributions to the field of rare earth materials and his innovative patents highlight his role as a key inventor in this domain. His work continues to influence advancements in technology and materials science.