Location History:
- Tottori, JP (1992)
- Tottori-ken, JP (1997)
- Tokushima, JP (2000)
Company Filing History:
4 out of 8,780 
2 out of 143 Years Active: 1992-2000
Title: Hirofumi Sako: Pioneering Innovations in Battery Technology
Introduction
Hirofumi Sako is a distinguished inventor hailing from Tottori-ken, Japan. With a remarkable portfolio of four patents, his contributions to the field of technology, particularly in the area of battery design, have made a significant impact. His innovative approaches and developments continue to catch the attention of many in the industry.
Latest Patents
One of Sako's notable patents is the rectangular battery. This inventive design features an electrode group inserted into a battery case that boasts an airtight structure. The electrode group is formed by alternately stacking positive and negative electrodes separated by separators. The rectangular battery case has a closed bottom with an open part that is sealed airtight by a cover. Notably, the outermost electrodes, which are located on both faces of the electrode group, are coated with an active material on the core's surface. Furthermore, these outermost electrodes share the same polarity, and their cores contact the inner surface of the battery case. An interesting design aspect is that the capacity of the outermost electrodes is smaller than that of the inwardly located electrodes of the same polarity, showcasing Sako's ingenuity.
Career Highlights
Hirofumi Sako has worked for prominent companies, including Sanyo Electric Co., Ltd. and Tottori Sanyo Electric Co., Ltd. His career has been marked by advancements in technology and innovation, especially in battery systems and related electronics.
Collaborations
During his professional journey, Sako has collaborated with talented individuals such as Hajime Sekino and Ryu Wakui. These partnerships have helped foster innovation and drive the development of groundbreaking technologies.
Conclusion
Hirofumi Sako's contributions to the realm of battery technology are noteworthy and continue to influence the industry. His inventive spirit and collaborations with others highlight the importance of teamwork in achieving extraordinary advancements in technology. As he continues his work, the potential for future innovations remains vast, further establishing his legacy as a key figure in the evolution of electronic devices.