Kokubunji, Japan

Hisashi Toyama

This inventor holds 2 USPTO granted patents. Top assignees: Hitachi, Ltd., Kasei Optonix, Ltd.. Active years: 1997-2000.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hisashi Toyama. Retrieved from https://idiyas.com/inventor/hisashi-toyama

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


% Patents Active = 100.0

Average Co-Inventor Count = 3.7

ph-index = 2

Forward Citations = 56(Granted Patents)


Company Filing History:


Years Active: 1997-2000

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2 patents (USPTO):Explore Patents

Title: Hisashi Toyama: Innovator in Phosphor Technology

Introduction

Hisashi Toyama is a notable inventor based in Kokubunji, Japan. He has made significant contributions to the field of phosphor technology, particularly in the development of cathode-ray tubes and displays. With a total of 2 patents to his name, Toyama's work has had a lasting impact on display technology.

Latest Patents

Hisashi Toyama's latest patents include innovations in phosphor materials and cathode-ray tube technology. One of his notable inventions is a green-emitting phosphor, which is a Tb-activated oxide represented by a specific compositional formula. This invention enhances the performance of cathode-ray tubes, making them more efficient and effective in display applications.

Career Highlights

Throughout his career, Toyama has worked with prominent companies such as Hitachi, Ltd. and Kasei Optonix, Ltd. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking advancements in display technology.

Collaborations

Hisashi Toyama has collaborated with esteemed colleagues, including Tsutomu Yamada and Yasuo Oguri. These partnerships have fostered innovation and have been instrumental in the development of his patented technologies.

Conclusion

Hisashi Toyama's contributions to phosphor technology and cathode-ray tube development highlight his role as a significant inventor in the field. His work continues to influence advancements in display technology, showcasing the importance of innovation in this area.

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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