Otsu, Japan

Takaharu Ichiryu

This inventor holds 8 USPTO granted patents. Top assignees: Toyo Boseki Kabushiki Kaisha, The Dow Chemical Company, Kabushikikaisha Kenwood. Active years: 1990-2008.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Takaharu Ichiryu. Retrieved from https://idiyas.com/inventor/takaharu-ichiryu

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile


% Patents Active = 87.5

Average Co-Inventor Count = 3.4

ph-index = 4

Forward Citations = 47(Granted Patents)


Location History:

  • Ohtsu, JP (1990 - 1998)
  • Otsu, JP (1998)
  • Osaka, JP (2007 - 2008)

Company Filing History:


Years Active: 1990-2008

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8 patents (USPTO):Explore Patents

Title: The Innovative Journey of Takaharu Ichiryu: A Pioneer in Polybenzazole Fibers

Introduction

Takaharu Ichiryu, an accomplished inventor based in Ohtsu, Japan, has made significant contributions to the field of materials science with a focus on the development of polybenzazole fibers. With a total of 8 patents to his name, Ichiryu's work is instrumental in enhancing the performance and applications of advanced materials.

Latest Patents

One of his notable patents is related to the invention of polybenzazole fibers, which are characterized by their use of organic pigments that boast high thermal resistance, capable of enduring temperatures up to 200°C or higher. These fibers maintain strength even under extreme conditions, such as exposure to light for extended periods and high humidity levels. The versatility of these polybenzazole fibers extends to various applications, including reinforcements in rubber and cement, as well as in protective clothing like knife-proof and bullet-proof vests. Another significant patent focuses on improvements in loudspeaker diaphragms, emphasizing enhanced tensile strength and uniform coloration throughout the material.

Career Highlights

Takaharu Ichiryu has worked with prominent companies such as Toyo Boseki Kabushiki Kaisha and The Dow Chemical Company. His expertise has not only led to innovative products but has also driven advancements in fiber technology within the industry.

Collaborations

Throughout his career, Ichiryu has collaborated with other notable professionals in the field, including Tadao Kuroki and Chieh-Chun Chau. These partnerships have contributed to the successful development of cutting-edge materials and their applications in various sectors.

Conclusion

Takaharu Ichiryu stands out as a leading inventor whose work in polybenzazole fibers has paved the way for innovations in material science. His dedication to enhancing fiber technology has opened new avenues for applications across multiple industries, making him a significant figure in the landscape of contemporary inventions.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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