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For the Inventor, By the Inventor

Kawasaki, Japan

Haruo Hasegawa

This inventor holds 4 USPTO granted patents and 5 published patent applications. Top assignee: Ricoh Company, Ltd.. Active years: 1976-1984.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Haruo Hasegawa. Retrieved from https://idiyas.com/inventor/haruo-hasegawa

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

USPTO Granted Patents = 4 

% Patents Active = 100.0

Average Co-Inventor Count = 4.3

ph-index = 3

Forward Citations = 24(Granted Patents)


Location History:

  • Tokyo, JA (1976)
  • Tokyo, JP (1981)
  • Kawasaki, JP (1980 - 1984)

Company Filing History:

goldMedal4 out of 28,940 
 
Ricoh Company, Ltd.
 patents

Years Active: 1976-1984

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4 patents (USPTO):Explore Patents
1. 4469771 - Electrophotographic light-sensitive member with thin overlayer (1984-09-04),
2. 4296190 - Photosensitive material for use in electrophotography with a radiation (1981-10-20),
3. 4225648 - Electrophotographic light-sensitive member (1980-09-30),
4. 3966471 - Electro photosensitive materials with a protective layer (1976-06-29),

Title: Haruo Hasegawa: Innovator in Electrophotography

Introduction

Haruo Hasegawa is a notable inventor based in Kawasaki, Japan. He has made significant contributions to the field of electrophotography, holding a total of 4 patents. His work focuses on enhancing the performance and durability of light-sensitive materials used in various applications.

Latest Patents

Hasegawa's latest patents include innovative technologies that improve electrophotographic light-sensitive members. One of his patents describes an electrophotographic light-sensitive member with a thin overlayer, which features a protective coating made of an organic high polymer containing Lewis acid. Another significant invention is a photosensitive material designed for use in electrophotography, which boasts superior durability, solvent resistance, and light sensitivity. This material consists of a photoconductive layer made from either inorganic or organic photoconductors, combined with an ionizing radiation-curable resin applied to a conductive support.

Career Highlights

Hasegawa is currently associated with Ricoh Company, Ltd., where he continues to innovate in the field of electrophotography. His work has been instrumental in advancing the technology used in imaging and printing solutions.

Collaborations

Throughout his career, Hasegawa has collaborated with esteemed colleagues such as Shiro Yamane and Hiroyoshi Taniguchi. These partnerships have contributed to the development of cutting-edge technologies in the industry.

Conclusion

Haruo Hasegawa's contributions to electrophotography exemplify his commitment to innovation and excellence. His patents reflect a deep understanding of materials science and engineering, making him a key figure in the advancement of imaging technologies.

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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