This inventor holds 4 USPTO granted patents. Top assignees: Nisshin Steel Co., Ltd., Canon Kabushiki Kaisha. Active years: 1992-1999.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Shinnanyo, JP (1992 - 1993)
- Tokyo, JP (1999)
Company Filing History:
4 out of 342 
1 out of 93,085 
Years Active: 1992-1999
Title: Takuji Okiyama: Innovator in Stainless Steel and Magnetic Alloys
Introduction
Takuji Okiyama is a notable inventor based in Shinnanyo, Japan. He has made significant contributions to the fields of materials science and engineering, particularly in the development of stainless steel sheets and soft magnetic alloys. With a total of 4 patents to his name, Okiyama's work has had a considerable impact on various industries.
Latest Patents
Okiyama's latest patents include a stainless steel sheet designed as a substrate for solar cells. This innovative stainless steel sheet features minute ripples with undulations along the rolling direction, with surface roughness controlled within the range of R.sub.z 0.3-1.4 μm and R.sub.max 0.5-1.7 μm. The manufacturing process involves finish cold rolling a stainless steel strip with a reduction ratio of at least 20% at a rolling speed of at least 400 m/min. The work rolls used are polished with abrasives of gage #100-#400 during the final pass, followed by annealing the rolled strip in an open-air atmosphere and electrolytically pickling the annealed strip in a nitric acid solution. This unique surface structure enhances energy conversion efficiency by promoting scattering and multiple reflections of incident light rays in non-single crystalline semiconductor layers. Additionally, he has developed a soft magnetic alloy material, which includes Fe-Ni, Fe-Ni-Cr, or Fe-Ni-Cr-Mo compositions. The surface roughness of this material is adjusted to Rz ≥ 0.5 or Ra ≥ 0.06, ensuring that parts made from it resist mutual adhesion or sticking during annealing treatments.
Career Highlights
Throughout his career, Okiyama has worked with prominent companies such as Nisshin Steel Co., Ltd. and Canon Inc. His expertise in materials has allowed him to contribute to advancements in manufacturing processes and product development.
Collaborations
Okiyama has collaborated with notable colleagues, including Takuji Hara and Yutaka Kawai. Their combined efforts have led to innovative solutions in the materials science sector.
Conclusion
Takuji Okiyama's contributions to the fields of stainless steel and magnetic alloys demonstrate his commitment to innovation and excellence.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile