Location History:
- Yokohama, JA (1977)
- Yokohama, JP (1991 - 1992)
Company Filing History:
3 out of 2,639 
2 out of 2 Years Active: 1977-1992
Title: **The Innovations of Yasuji Fujii: A Pioneer in Fine Copper Wire Technology**
Introduction:
Yasuji Fujii, an accomplished inventor based in Yokohama, Japan, has made significant contributions to the field of electronics through his innovative work in fine copper wire technology. With a portfolio of three patents, Fujii's inventions represent a vital advancement for electronic instruments, showcasing his expertise and commitment to enhancing manufacturing processes.
Latest Patents:
One of Fujii's latest patents involves the development of a fine copper wire specifically designed for electronic instruments. This innovative wire comprises a composition that includes 0.05 to 10 parts per million (ppm) of one or more types of titanium (Ti), zirconium (Zr), vanadium (V), hafnium (Hf), chromium (Cr), calcium (Ca), magnesium (Mg), yttrium (Y), and other rare-earth elements. Additionally, it contains 1 to 30 ppm of oxygen, with the remainder being copper (Cu). The manufacturing method outlined in the patent involves hot rolling the ingot achieved through melting and casting in a non-oxidative atmosphere or vacuum. This process includes repeated stretch processing and multiple rounds of intermediate annealing to achieve a wire of fixed diameter, followed by final annealing under controlled atmospheric conditions to attain the desired mechanical properties.
Career Highlights:
Fujii has had an impactful career, notably working with reputed companies such as Furukawa Electric Co., Ltd. and Furukawa Special Metal Co., Ltd. His roles in these organizations have allowed him to leverage his inventive skills, directly contributing to advancements in the electronics sector.
Collaborations:
Throughout his career, Yasuji Fujii has collaborated with esteemed colleagues, including Toru Tanigawa and Masaaki Kurihara. Their joint efforts have further propelled innovations within their field, demonstrating the importance of teamwork in achieving significant technological breakthroughs.
Conclusion:
Yasuji Fujii stands out as a notable inventor in the realm of fine copper wire technology for electronic instruments. His dedication to research and development, as evidenced by his patents and collaborative efforts, highlights the impactful role he plays in pushing the boundaries of innovation in the electronics industry. Through his work, Fujii continues to inspire future advancements and inspire others in the field of invention.