Sumio Hagiwara is a notable inventor based in Tokorozawa, Japan. He has made significant contributions to the field of audio technology, holding a total of 5 patents. His work primarily focuses on speaker systems and advanced materials for audio components.

Latest Patents

Hagiwara's latest patents include a speaker system and a method of controlling directivity. This innovative speaker system features a common input terminal for receiving audio signals, several speaker units, and digital filters that enhance sound quality. The arrangement of the speaker units can be linear, matrix, or honeycomb, allowing for versatile acoustic applications. Another notable patent involves molding compositions and diaphragms, arm pipes, and head shells. This composition blends flaky graphite with a thermoplastic resin, resulting in materials that exhibit high specific modulus of elasticity and good internal loss, comparable to traditional materials like aluminum and beryllium.

Career Highlights

Hagiwara is currently associated with Pioneer Electronic Corporation, a leading company in the audio and electronics industry. His work has significantly impacted the development of high-quality audio products, enhancing the listening experience for consumers worldwide.

Collaborations

Throughout his career, Hagiwara has collaborated with esteemed colleagues such as Tsunehiro Tsukagoshi and Toshikazu Yoshino. These partnerships have fostered innovation and creativity in their projects, leading to advancements in audio technology.

Conclusion

Sumio Hagiwara's contributions to audio technology through his patents and collaborations highlight his role as a key innovator in the field. His work continues to influence the industry, paving the way for future advancements in sound engineering.

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