Company Filing History:
3 out of 8,002 
2 out of 3 Years Active: 1991-1995
Title: Naoe Hirai: Innovator in Ferrite Technology
Introduction
Naoe Hirai is a notable inventor based in Yokohama, Japan. He has made significant contributions to the field of ferrite technology, holding a total of 3 patents. His work focuses on the development of materials that enhance the performance of electronic devices.
Latest Patents
Hirai's latest patents include a Mn-Zn ferrite that contains a maximum of 0.005 wt. % phosphorus. This innovation is crucial for improving the quality of ferrite materials used in various applications. Another significant patent involves a purified solution containing iron and manganese. This solution has a phosphorus content not exceeding about 0.007 wt. % relative to the total content of iron and manganese. The method for producing this purified solution includes dissolving manganese-containing raw material in hydrochloric solution, oxidizing the solution, adjusting the pH to between 2.5 and 4.5 to form insolubles, and separating these insolubles from the solution. The resulting mixed powder of iron oxide and manganese oxide is particularly useful for producing high-quality soft ferrite.
Career Highlights
Throughout his career, Naoe Hirai has worked with prominent companies such as TDK Corporation and Chemirite Ltd. His experience in these organizations has allowed him to refine his expertise in material science and innovation.
Collaborations
Hirai has collaborated with notable colleagues, including Tohoru Murase and Katsunobu Okutani. These partnerships have contributed to the advancement of his research and the successful development of his patents.
Conclusion
Naoe Hirai's contributions to ferrite technology and his innovative patents highlight his role as a significant inventor in the field. His work continues to influence advancements in electronic materials and applications.