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For the Inventor, By the Inventor

Sagamihara, Japan

Hirofumi Okuyama

This inventor holds 9 USPTO granted patents. Top assignee: Fujitsu Corporation. Active years: 1976-1985.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hirofumi Okuyama. Retrieved from https://idiyas.com/inventor/hirofumi-okuyama

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

USPTO Granted Patents = 9

% Patents Active = 100.0

Average Co-Inventor Count = 4.1

ph-index = 4

Forward Citations = 31(Granted Patents)


Location History:

  • Sagamihara, J (1976)
  • Sagamihara, JP (1982 - 1985)

Company Filing History:

goldMedal9 out of 39,371 
 
Fujitsu Corporation
 patents

Years Active: 1976-1985

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9 patents (USPTO):Explore Patents
1. 4555466 - Developer comprising a carrier coated with Fe.sub.3 O.sub.4 dispersed in (1985-11-26),
2. 4547309 - Storage-type liquid crystal composition (1985-10-15),
3. 4522909 - Process for preparing electrostatic developer (1985-06-11),
4. 4517266 - Holographic recording material and process for producing holograms (1985-05-14),
5. 4513075 - Developer materials for electrostatic images (1985-04-23),
6. 4455361 - Process for preparing developer materials for electrostatic images (1984-06-19),
7. 4454213 - Organic photosensitive material for electrophotography (1984-06-12),
8. 4362801 - Copper phthalocyanine photosensitive material for electrophotography (1982-12-07),
9. 3997463 - Nematic liquid crystal composition for electro-optical displays (1976-12-14),

Title: Hirofumi Okuyama: Innovator in Liquid Crystal Technology

Introduction

Hirofumi Okuyama is a prominent inventor based in Sagamihara, Japan. He has made significant contributions to the field of electrostatic imaging and liquid crystal technology. With a total of 9 patents to his name, Okuyama's work has had a lasting impact on various technological advancements.

Latest Patents

Okuyama's latest patents include a developer comprising a carrier coated with Fe.sub.3 O.sub.4 dispersed in a developing material for electrostatic images. This innovative developer features carrier particles made of iron beads coated with butadiene polymer resin, which enhances the performance of electrostatic imaging. Additionally, he has developed a storage-type liquid crystal composition that utilizes a nematic-cholesteric mesophase transition. This composition is notable for its low driving voltage and long memory effect, making it suitable for advanced display technologies.

Career Highlights

Hirofumi Okuyama has spent a significant portion of his career at Fujitsu Corporation, where he has been instrumental in developing cutting-edge technologies. His expertise in liquid crystal displays and electrostatic imaging has positioned him as a key figure in the industry. His innovative approaches have led to advancements that benefit both consumers and businesses alike.

Collaborations

Throughout his career, Okuyama has collaborated with notable colleagues, including Toshiaki Narusawa and Seiji Okada. These partnerships have fostered a creative environment that has resulted in groundbreaking inventions and patents.

Conclusion

Hirofumi Okuyama's contributions to the fields of electrostatic imaging and liquid crystal technology exemplify his innovative spirit and dedication to advancing technology. His work continues to influence the industry and inspire future inventors.

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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