Company Filing History:
5 out of 240 
3 out of 386 
1 out of 895 
Years Active: 1990-1995
Title: Innovations of Atsushi Hamamura in Ferrite Magnet Production
Introduction
Atsushi Hamamura is a notable inventor based in Kyoto, Japan. He has made significant contributions to the field of materials science, particularly in the production of ferrite magnets. With a total of 5 patents to his name, his work has advanced the understanding and manufacturing processes of magnetic materials.
Latest Patents
One of his latest patents is a process for producing calcined materials for ferrite magnets. This invention aims to eliminate foreign phases produced in calcined powders, resulting in ferrite magnets with superior magnetic properties. The process involves subjecting mill scales, roughly milled to a mean particle size of 20 micrometers or less, to a primary oxidation treatment. This treatment changes the oxidation percentage to 95% or higher. The material is then oxidized completely by secondary oxidation treatment in an inclined rotary kiln at temperatures up to 700 degrees Celsius in an atmosphere containing 8% to 10% O2. This innovative approach ensures that foreign phases are not produced during ferrite formation at high temperatures, leading to high-quality ferrite magnets.
Another significant patent involves a powder material for rare earth-iron-boron based permanent magnets. This powder is a blend of specific powders designed to enhance the production of permanent magnets, showcasing Hamamura's expertise in material composition and processing.
Career Highlights
Atsushi Hamamura has worked with prominent companies in the industry, including Sumitomo Special Metals Co., Ltd. and Toda Kogyo Corporation. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking advancements in magnet technology.
Collaborations
Throughout his career, Hamamura has collaborated with talented individuals such as Takaki Hamada and Tomoyuki Imai. These partnerships have fostered innovation and have been instrumental in the development of his patented technologies.
Conclusion
Atsushi Hamamura's contributions to the field of ferrite magnet production are noteworthy. His innovative processes and collaborations have significantly impacted the materials science industry. His work continues to inspire advancements in magnetic materials and their applications.
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.