This inventor holds 4 USPTO granted patents. Top assignees: Hitachi, Ltd., Nippon Mining Co., Ltd., Hitachi Chemical Company, Ltd.. Active years: 1980-2000.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
4 out of 42,743 
2 out of 141 
1 out of 1,641 Years Active: 1980-2000
Title: The Innovative Journey of Takeo Yamagata
Introduction
Takeo Yamagata, an esteemed inventor from Takahagi, Japan, has made significant contributions in the field of energy storage and fuel cell technology. With a total of four patents to his name, Yamagata has dedicated his career to creating advanced solutions that enhance the efficiency and reliability of energy systems.
Latest Patents
Among his latest innovations, Yamagata developed a secondary battery that greatly improves the performance of lithium secondary batteries. This battery is designed for applications such as electric vehicles and portable devices. The technology features a negative electrode made of a carbon material that carries fine metal particles capable of forming an alloy with lithium. This advanced structure not only exceeds the theoretical discharge capacity of graphite but also achieves an output energy density of 350 W/kg or higher.
Additionally, Yamagata contributed to the development of a highly efficient fuel cell. This fuel cell comprises stacked unit cells with a simple yet effective structural design that ensures high reliability in fabrication and operation. With optimized gas flow passages, the fuel cell maximizes gas utilization efficiency, making it an attractive option for future energy solutions.
Career Highlights
Yamagata's professional journey includes vital positions at renowned companies such as Hitachi, Ltd. and Nippon Mining Co., Ltd. His experiences in these organizations have shaped his innovative approach to technology and invention.
Collaborations
Throughout his career, Yamagata has collaborated with notable colleagues, including Seiichi Uchida and Yoshihito Satomi. These partnerships have undoubtedly played a crucial role in nurturing creativity and advancing research initiatives within their fields.
Conclusion
Takeo Yamagata's contributions to the realms of battery and fuel cell technology reflect his commitment to pioneering innovations that meet the needs of modern energy applications. His extensive patent portfolio and collaborative efforts with industry peers continue to influence advancements in sustainable energy solutions.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile