Location History:
- Hiroshima, JP (1996)
- Takehara, JP (1999)
- Saitama, JP (2004)
Company Filing History:
4 out of 817 
1 out of 8 Years Active: 1996-2004
Title: Hiroshi Sumida: Innovator in Battery Technology
Introduction
Hiroshi Sumida is a distinguished inventor based in Takehara, Japan, known for his significant contributions to battery technology. With a total of four patents to his name, he has dedicated his career to developing innovative solutions that enhance the efficiency and performance of lithium primary batteries and hydrogen storage alloys.
Latest Patents
Among his latest patents, Sumida has developed a process for producing manganese dioxide specifically for lithium primary batteries. This process utilizes soda neutralization and heat treatment of electrolytic manganese dioxide, achieving a sodium content of 0.05 to 0.2% by weight. In addition, he has patented a method for reducing impurities in misch metal and alloys. This method effectively reduces carbon content in hydrogen storage alloys derived from the negative electrodes of nickel/hydrogen storage alloy secondary batteries. The innovation involves the addition of titanium or zirconium, along with their oxides, and requires melting in an inert gas atmosphere or vacuum.
Career Highlights
Sumida has made notable strides in his career through his roles in prominent companies. He has worked with Mitsui Mining & Smelting Company, Ltd. and Matsushita Electric Corporation, Ltd., where he honed his skills and knowledge in the field of material science and battery technology.
Collaborations
Throughout his career, Sumida has collaborated with esteemed colleagues such as Kiyoteru Enomoto and Yoshio Nakatani. These partnerships have been instrumental in advancing his innovative endeavors and expanding the potential applications of his inventions.
Conclusion
Hiroshi Sumida continues to be a pivotal figure in the realm of battery technology. His inventive processes and methods not only enhance battery performance but also contribute to the sustainability of energy storage solutions. With a promising portfolio of patents and a track record of influential collaborations, Sumida’s work is set to leave a lasting impact on the industry.