Location History:
- Yamagata-ken, JP (2004 - 2006)
- Tendo, JP (2004 - 2012)
- Yamagata, JP (2008 - 2013)
Company Filing History:
8 out of 2,648 
8 out of 291 
2 out of 832,880 Years Active: 2004-2013
Title: The Innovations of Inventor Koji Maekawa
Introduction
Koji Maekawa is a prominent inventor based in Tendo, Japan. Renowned for his contributions to the field of audio technology, he holds a total of 10 patents that showcase his remarkable ingenuity. His work primarily focuses on high-performance speaker designs that utilize innovative approaches to magnetic circuits and diaphragm structures.
Latest Patents
One of Maekawa's notable patents is centered around a high-performance speaker featuring a simplified magnetic circuit. This innovation eliminates the need for complex manufacturing processes. The speaker includes an inner-magnet-type magnetic circuit designed with a magnet, a plate, and a yoke, along with a voice coil supported close to the plate's end, allowing for optimal vibration. The design also incorporates a diaphragm with both dome-shaped and cone-shaped vibrating sections, expertly molded together for exceptional performance.
Another significant invention is a speaker device that employs a pair of oppositely disposed diaphragms. It consists of a frame that supports the diaphragms in a direction conducive to vibration and utilizes multiple driving parts. These driving components include magnetic circuits and voice coils, facilitating effective response to audio signals. This innovative arrangement ensures an improved auditory experience, highlighting Maekawa's commitment to enhancing sound quality.
Career Highlights
Throughout his career, Koji Maekawa has made substantial contributions while working at notable companies such as Pioneer Corporation and Tohoku Pioneer Corporation. His tenure at these firms facilitated his exploration of advanced audio technologies, enabling him to develop groundbreaking inventions that have been recognized in the industry.
Collaborations
Maekawa has collaborated with distinguished colleagues, including Hiroyuki Dohi and Tetsuya Onuma. Working alongside such talented individuals has likely played a significant role in fostering innovation and advancing their shared goals within the audio technology sector.
Conclusion
Koji Maekawa’s innovative spirit is clearly reflected in his patents and contributions to speaker technology. His ability to simplify complex designs while enhancing performance has made a lasting impact in the field. As he continues to push the boundaries of audio engineering, Maekawa stands as a testament to the profound influence of inventors in shaping modern technology.