Location History:
- Hiroshima, JP (1988 - 2001)
- Hatsukaichi, JP (1997 - 2008)
- Ohtake, JP (2012)
Company Filing History:
16 out of 386 
2 out of 264 Years Active: 1988-2012
Title: Tsutomu Katamoto: Innovator in Magnetic Materials
Introduction
Tsutomu Katamoto is a prominent inventor based in Hatsukaichi, Japan. He holds a total of 16 patents, showcasing his significant contributions to the field of magnetic materials and their applications. His innovative work has led to advancements in various technologies, particularly in magnetic recording mediums.
Latest Patents
Among his latest patents, Katamoto has developed spinel-type ferrimagnetic particles and a process for producing them. These particles have a specific composition represented by the formula (MO)·/2(FeO), where M is a divalent metal. The molar ratio of Fe to M (n) ranges from more than 2.05 to less than 2.5. The particles contain a superparamagnetic component in an amount of not more than 2% by mass and have an average particle diameter of 5 to 30 nm. They are coated on the surface with a hydroxide of at least one metal, such as Si, Al, P, and Zn, in an amount of not more than 10% by mass. These spinel-type ferrimagnetic particles exhibit a high coercive force and are excellent in dispersibility and chemical stability. Additionally, the magnetic recording medium developed using these particles demonstrates outstanding frequency characteristics, high output, weather resistance, and reliability. Another notable patent involves Mg-Al-based hydrotalcite-type particles and a chlorine-containing resin composition for covering electric wires, which boasts heat stability and high volume resistivity.
Career Highlights
Throughout his career, Tsutomu Katamoto has worked with notable companies, including Toda Kogyo Corporation and Dainichiseika Color & Chemicals Mfg. Co., Ltd. His work in these organizations has allowed him to refine his expertise in material science and contribute to innovative solutions in the industry.
Collaborations
Katamoto has collaborated with esteemed colleagues, including Naoya Kobayashi and Torayuki Honmyo. Their combined efforts have further advanced the research and development of magnetic materials.
Conclusion
Tsutomu Katamoto's contributions to the field of magnetic materials through his patents and collaborations highlight his role as an influential inventor. His innovative work continues to impact various technologies and industries.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.