Location History:
- Kadoma, JP (1984)
- Osaka, JP (1984 - 1991)
- Hirakata, JP (1988 - 1991)
Company Filing History:
Years Active: 1984-1991
Title: The Innovative Journey of Seiichi Ishikawa
Introduction
Seiichi Ishikawa, an accomplished inventor based in Hirakata, Japan, has made significant contributions to the field of audio technology with a total of nine patents to his name. He is notably recognized for his work in developing cutting-edge audio equipment that provides high-fidelity sound.
Latest Patents
Among his latest innovations is a thin speaker designed with an enclosure that features both an open and closed portion. This unique design addresses the challenge of achieving high-fidelity reproduction while maintaining an adequate sound pressure level, even when the speaker is placed close to a wall. The invention includes a closed chamber located behind part of the diaphragm and an open chamber behind another part. By utilizing an acoustic duct, Ishikawa's design minimizes sound cancellation and enhances sound pressure levels.
Another significant patent involves a method and apparatus for calculating filter factors, where a transfer function is determined based on amplitude and phase characteristics. This process involves complex transformations to update and refine the characteristics, ultimately leading to the creation of a FIR digital filter that incorporates the calculated filter factors.
Career Highlights
Ishikawa is employed at Matsushita Electric Industrial Co., Ltd., a leading company renowned for its innovations in electronics. His work at Matsushita has been instrumental in advancing audio technology, contributing to the development of products that enhance user experiences in sound quality.
Collaborations
Throughout his career, Ishikawa has collaborated with notable colleagues, including Katsuaki Satoh and Masaharu Matsumoto. These collaborations have further enriched his innovative endeavors and led to the development of advanced technologies and products.
Conclusion
Seiichi Ishikawa exemplifies the spirit of innovation in audio technology. His patents not only reflect his expertise but also his commitment to enhancing the quality of sound reproduction. As he continues to develop new technologies, Ishikawa's contributions will likely resonate in the audio industry for years to come.
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.