This inventor holds 2 USPTO granted patents. Top assignees: Hitachi Chemical Company, Ltd., Hitachi Powdered Metals Co., Ltd.. Active years: 2015-2017.
Company Filing History:
1 out of 1,641 
1 out of 149 Years Active: 2015-2017
Title: Jiro Shima: Innovator in Powder Magnetic Core Technology
Introduction
Jiro Shima is a notable inventor based in Matsudo, Japan. He has made significant contributions to the field of magnetic core technology, holding 2 patents that showcase his innovative approach to manufacturing processes.
Latest Patents
Shima's latest patents include advancements in powder magnetic core technology. One patent details a method of manufacturing a powder compact for a magnetic core. This process involves filling a die hole with soft magnetic powder, pressing it to achieve a density ratio of 91% or more, and extruding it from the die hole. A lubricating coating containing lubricating oil and molybdenum disulfide particles is applied to the inner surface of the die hole before filling it with powder. This method enhances the effectiveness of the compact, especially when insulating ceramic particles are included. The resulting powder magnetic core is particularly suitable for high-frequency applications. Another patent focuses on the design of a substantially cylindrical powder compact and die assembly for compacting powder, featuring a unique cross-sectional shape that optimizes the manufacturing process.
Career Highlights
Throughout his career, Jiro Shima has worked with prominent companies such as Hitachi Chemical Company, Ltd. and Hitachi Powdered Metals Co., Ltd. His experience in these organizations has contributed to his expertise in the field of magnetic materials and manufacturing techniques.
Collaborations
Shima has collaborated with notable colleagues, including Takashi Inagaki and Chio Ishihara. Their joint efforts have further advanced the development of innovative technologies in the industry.
Conclusion
Jiro Shima's contributions to powder magnetic core technology reflect his dedication to innovation and excellence in manufacturing processes. His patents and collaborations highlight his significant impact on the field.