Location History:
- Saitama, JP (2019)
- Tokyo, JP (2022)
Company Filing History:
2 out of 2 
1 out of 1,142 
Years Active: 2019-2022
Title: Mutsuki Ishijima: Innovator in Copper-Zinc Alloys and Mechanical Devices
Introduction
Mutsuki Ishijima is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of materials science, particularly in the development of advanced copper-zinc alloys and mechanical devices. With a total of 2 patents to his name, Ishijima's work showcases his innovative approach to solving engineering challenges.
Latest Patents
Ishijima's latest patents include a wear-resistant copper-zinc alloy and a mechanical device utilizing this alloy. The first patent describes a wear-resistant copper-zinc alloy that consists of 28 to 55% Zn, 0.5 to 2% P, and a balance of Cu and unavoidable impurities. This alloy exhibits an electrical conductivity of 10 to 33% IACS and a hardness of 3.6[Zn]-55 HBW or more. An alternative formulation includes 40 to 55% Zn and 1 to 6% Mn, maintaining similar electrical conductivity and hardness properties.
The second patent focuses on a copper alloy tube made from a CuCrZr alloy, which is designed to suppress the deterioration of mechanical strength during high-temperature processes. The manufacturing method involves a solutionizing step at temperatures of 900°C or greater, followed by water-quenching. This process ensures excellent high-temperature brazeability and maintains the integrity of the alloy's crystal structure.
Career Highlights
Throughout his career, Ishijima has worked with prominent companies such as Miyoshi Gokin Kogyo Co., Ltd. and IHI Corporation. His experience in these organizations has allowed him to refine his expertise in materials engineering and contribute to various innovative projects.
Collaborations
Ishijima has collaborated with notable colleagues, including Hayao Eguchi and Masato Arai. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies in the field of materials science.
Conclusion
Mutsuki Ishijima's contributions to the field of copper-zinc alloys and mechanical devices highlight his innovative spirit and dedication to engineering excellence. His patents reflect a commitment to advancing materials technology, making a lasting impact in the industry.