Company Filing History:
2 out of 1,887 
1 out of 149 Years Active: 2012-2013
Title: Sohei Yamada: Innovator in Iron-Based Magnetic Powders
Introduction
Sohei Yamada is a notable inventor based in Kosai, Japan. He has made significant contributions to the field of magnetic materials, particularly through his innovative patents related to iron-based powders.
Latest Patents
Yamada holds 2 patents, with his latest inventions focusing on iron-based soft magnetic powders. One of his patents describes an iron-based magnetic powder for dust cores that features layers of phosphoric acid-based film and silicone resin film on its surface. This innovative design enhances insulation among iron powder particles while maintaining mechanical strength and thermal stability, even after high-temperature heat treatment. Another patent relates to an iron-base powder for powder cores, which allows for reduced coercivity and hysteresis loss by ensuring that 70% or more of the measured crystal grains have a size of 50 micrometers or more.
Career Highlights
Throughout his career, Sohei Yamada has worked with prominent companies such as Kobe Steel, Ltd. and Hitachi Powdered Metals Co., Ltd. His experience in these organizations has contributed to his expertise in the development of advanced magnetic materials.
Collaborations
Yamada has collaborated with notable colleagues, including Hiroyuki Mitani and Nobuaki Akagi. Their joint efforts have furthered research and development in the field of magnetic powders.
Conclusion
Sohei Yamada's contributions to the field of iron-based magnetic powders demonstrate his innovative spirit and commitment to advancing technology. His patents reflect a deep understanding of material science and its applications in various industries.