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For the Inventor, By the Inventor

Fujisawa, Japan

Hajime Hara

This inventor holds 22 USPTO granted patents. Top assignees: Nippon Oil Company, Nippon Petrochemicals Company, Limited. Active years: 1979-1992.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hajime Hara. Retrieved from https://idiyas.com/inventor/hajime-hara

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

USPTO Granted Patents = 22

% Patents Active = 100.0

Average Co-Inventor Count = 4.2

ph-index = 7

Forward Citations = 111(Granted Patents)


Location History:

  • Fujisawa, JP (1979 - 1992)
  • Kanagawa, JP (1992)

Company Filing History:

goldMedal21 out of 690 
 
Nippon Oil Company
 patents
silverMedal1 out of 327 
 
Nippon Petrochemicals Company, Limited
 patents

Years Active: 1979-1992

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22 patents (USPTO):Explore Patents
1. 5110698 - Method of recording (1992-05-05),
2. 5097016 - Nonlinear optical materials of polypeptides (1992-03-17),
3. 4999416 - Wholly aromatic polyesters (1991-03-12),
4. 4933243 - Recording medium (1990-06-12),
5. 4891418 - Cholesteric liquid crystal polyester (1990-01-02),
6. 4746722 - Cholesteric liquid crystal polyesters (1988-05-24),
7. 4738811 - Process for producing cholesteric liquid crystal polyester film or sheet (1988-04-19),
8. 4734483 - Cholesteric liquid crystal polyester from hydroquinone, cyclohexane (1988-03-29),
9. 4698397 - Cholesteric liquid crystal copolyesters (1987-10-06),
10. 4652626 - High modulus cholesteric liquid crystal polyesters (1987-03-24),
11. 4639503 - Thermosetting resin composition (1987-01-27),
12. 4563501 - Cathode-precipitating electrodeposition coating composition (1986-01-07),
13. 4423239 - Method for purifying an epoxidation product (1983-12-27),
14. 4423172 - Self-curable coating composition for cathode-precipitating (1983-12-27),
15. 4370453 - Process for preparing cathodic electrodepositable coating composition (1983-01-25),

Title: Hajime Hara - Innovator in Nonlinear Optical Materials and Recording Technologies

Introduction

Hajime Hara is a prominent inventor based in Fujisawa, Japan, with a remarkable portfolio that includes 22 patents. His innovative work primarily focuses on recording technologies and nonlinear optical materials, paving the way for advancements in these fields.

Latest Patents

Among his latest patents is a sophisticated method of recording that features a rewritable or repeatedly employable recording medium. This medium consists of a base and a recording layer film, which is innovatively formed by a thermotropic cholesteric liquid crystal polyester. Additionally, he has developed nonlinear optical materials of polypeptides, which are obtained by blending 50-99% by weight of a polypeptide with 1-50% by weight of a compound that demonstrates a nonlinear optical response. These materials showcase a large nonlinear optical constant, exhibit high and stable second harmonic generation (SHG) activity, and are capable of easy phase matching.

Career Highlights

Hajime Hara has made significant contributions during his career, having worked for notable companies such as Nippon Oil Company and Nippon Petrochemicals Company Limited. His experiences in these organizations have greatly influenced his innovative pursuits and technical expertise, leading to numerous patents in his name.

Collaborations

Throughout his career, Hajime has collaborated with esteemed colleagues, including Yoshihiko Araki and Tomohiro Toya. These collaborations have fostered an environment of shared knowledge and innovation, enhancing the outcomes of their research and development efforts.

Conclusion

Hajime Hara stands out as a dedicated inventor whose contributions to the fields of recording technologies and nonlinear optical materials have set benchmarks for future advancements. With a strong portfolio of patents and a history of collaboration with leading professionals, his work continues to inspire the realms of innovation and technology.

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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