Location History:
- Edogawa-ku, JP (2003 - 2005)
- Tokyo, JP (1989 - 2006)
Company Filing History:
5 out of 1,112 
2 out of 10 
1 out of 35,734 
Years Active: 1989-2006
Title: Katsuji Nakagawa: Innovator in Magneto-Optical Technology
Introduction
Katsuji Nakagawa is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of magneto-optical technology, holding a total of nine patents. His work focuses on improving the efficiency and quality of data recording and reproduction.
Latest Patents
Among his latest patents is a method for recording and reproduction on a magneto-optical recording medium. This invention aims to enhance the reproduction of information recorded by multi-valued recording at a high signal-to-noise (S/N) ratio. The patent describes a magneto-optical recording medium that includes two magnetic layers capable of four-valued recording based on four combined magnetization states. The reproduction signals concerning these states are optimized for different wavelengths, allowing for improved data retrieval. Another notable patent involves a magneto-optical reproducing method that utilizes multiple reproducing beams of different wavelengths. This method enhances recording density and improves the clarity of reproduction signals through magnetic domain enlargement.
Career Highlights
Katsuji Nakagawa has worked with several notable companies throughout his career, including Hitachi Maxell, Limited and Trek, Inc. His experience in these organizations has allowed him to develop and refine his innovative ideas in magneto-optical technology.
Collaborations
He has collaborated with esteemed colleagues such as Katsusuke Shimazaki and Norio Ohta, contributing to advancements in their shared field of expertise.
Conclusion
Katsuji Nakagawa's contributions to magneto-optical technology have significantly impacted the industry. His innovative patents and collaborations reflect his dedication to advancing data recording and reproduction methods.