Company Filing History:
2 out of 929 
1 out of 832,812 Years Active: 2000-2001
Title: Kazuki Fujiwara: Innovator in High-Tensile-Strength Steel
Introduction
Kazuki Fujiwara is a prominent inventor based in Nishinomiya, Japan. He has made significant contributions to the field of materials science, particularly in the development of high-tensile-strength steel. With a total of 3 patents to his name, Fujiwara's work is recognized for its innovative approaches to steel manufacturing.
Latest Patents
Fujiwara's latest patents include a high-tensile-strength steel and a method of manufacturing the same. This steel exhibits excellent toughness throughout its thickness and outstanding properties at welded joints, achieving a tensile strength of at least about 900 MPa (130 ksi). The composition of this steel includes specific percentages of carbon, silicon, manganese, nickel, niobium, titanium, aluminum, nitrogen, copper, chromium, molybdenum, vanadium, boron, and calcium. Additionally, the carbide size in the steel is limited to not greater than 5 microns in the longitudinal direction. Another notable patent focuses on high-toughness, high-tensile-strength steel, which also achieves a tensile strength of not less than 900 MPa. The microstructure of this steel may consist of a mixed structure of martensite and lower bainite, ensuring high performance in various applications.
Career Highlights
Throughout his career, Kazuki Fujiwara has worked with notable companies, including Sumitomo Metal Industries, Inc. His expertise in steel manufacturing has positioned him as a key figure in the industry, contributing to advancements in material properties and applications.
Collaborations
Fujiwara has collaborated with esteemed colleagues such as Shuji Okaguchi and Masahiko Hamada. These partnerships have further enhanced his research and development efforts in the field of high-tensile-strength steel.
Conclusion
Kazuki Fujiwara's innovative work in high-tensile-strength steel has made a significant impact on materials science. His patents reflect a commitment to excellence and advancement in steel manufacturing, showcasing his role as a leading inventor in this field.