Location History:
- Ibaraki, JP (1993)
- Hirakata, JP (2004 - 2011)
- Osaka, JP (2009 - 2012)
Company Filing History:
8 out of 2,333 
4 out of 85 
1 out of 240 Years Active: 1993-2012
Title: Hiroyuki Tomizawa: Innovator in Magnet Technology
Introduction
Hiroyuki Tomizawa is a prominent inventor based in Hirakata, Japan. He has made significant contributions to the field of magnet technology, holding a total of 13 patents. His work focuses on the development of advanced materials that enhance the performance of magnets.
Latest Patents
One of his latest patents is the R-T-Cu-Mn-B type sintered magnet. This innovative magnet includes 12.0 at % to 15.0 at % of R, which consists of rare-earth elements, primarily Pr and/or Nd. It also contains 5.5 at % to 6.5 at % of B, 0.08 at % to 0.35 at % of Cu, and 0.04 at % to less than 0.2 at % of Mn. Additionally, it allows for at most 2 at % of M, which can include various elements such as Al, Ti, and Ni, with T being either Fe alone or a combination of Fe and Co. Another notable patent involves a method for producing magnetically anisotropic permanent magnet powder. This method includes preparing a master alloy by cooling a rare-earth-iron-boron based molten alloy and subjecting it to an HDDR process.
Career Highlights
Hiroyuki Tomizawa has worked with notable companies such as Hitachi Metals, Ltd. and Neomax Co., Ltd. His experience in these organizations has allowed him to refine his expertise in magnet technology and contribute to various innovative projects.
Collaborations
Throughout his career, Tomizawa has collaborated with talented individuals, including Yuji Kaneko and Satoshi Hirosawa. These partnerships have fostered a creative environment that has led to groundbreaking advancements in the field.
Conclusion
Hiroyuki Tomizawa's contributions to magnet technology through his patents and collaborations highlight his role as a leading inventor in this specialized field. His innovative work continues to influence the development of advanced magnetic materials.