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For the Inventor, By the Inventor

Ibaraki, Japan

Hideaki Yasunaga

This inventor holds 50 USPTO granted patents and 2 published patent applications and 5 EPO patents, primarily in Image Forming Technology (CPC class 4301). Top assignees: Ricoh Company, Ltd., Minolta Company, Ltd.. Active years: 1997-2018.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hideaki Yasunaga. Retrieved from https://idiyas.com/inventor/hideaki-yasunaga

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

USPTO Granted Patents = 50 

% Patents Active = 46.0

 

Average Co-Inventor Count = 5.2

ph-index = 8

Forward Citations = 182(Granted Patents)

Forward Citations (Not Self Cited) = 160(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Sakai, JP (1997 - 2000)
  • Nishinomiya, JP (2000)
  • Ibaragi, JP (2011)
  • Ibaraki, JP (2001 - 2012)
  • Osaka, JP (2013 - 2015)
  • Tokyo, JP (2015 - 2018)

Company Filing History:

goldMedal38 out of 28,940 
 
Ricoh Company, Ltd.
 patents
silverMedal12 out of 2,816 
 
Minolta Company, Ltd.
 patents

Years Active: 1997-2018

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Areas of Expertise:
Image Forming Apparatus
Developing Device
Toner Composition
Electrophotography
Process Cartridge
Single Component Development
Toner Recovery
Full-Color Toner Kit
Pulverized Toner
Non-Magnetic Toner
Image Developer
Two-Component Developer
50 patents (USPTO):Explore Patents
1. 10001731 - Composition for seamless belt, and image forming apparatus using the belt (2018-06-19),
2. 9983505 - Developing roller, process cartridge, image forming apparatus and image forming method (2018-05-29),
3. 9921526 - Semiconductive resin composition, member for electrophotography and image forming apparatus (2018-03-20),
4. 9891558 - Semiconductive resin composition, member for electrophotography and image forming apparatus (2018-02-13),
5. 9851656 - Developing roller, toner and image forming apparatus (2017-12-26),
6. 9778602 - Image forming apparatus (2017-10-03),
7. 9720354 - Intermediate transfer belt (2017-08-01),
8. 9625858 - Intermediate transfer belt, and image forming apparatus using the belt (2017-04-18),
9. 9122204 - Developing device, process cartridge, image forming apparatus, and image forming method (2015-09-01),
10. 9098013 - Developing roller, developing device, process cartridge, and image forming apparatus (2015-08-04),
11. 9031478 - Developing roller including a roughened outermost surface, and developing device and image forming apparatus including the same (2015-05-12),
12. 9026015 - Developing roller, and developing device, process cartridge and image forming method and apparatus using the developing roller (2015-05-05),
13. 8526864 - Image developer, process cartridge, and image forming apparatus (2013-09-03),
14. 8329371 - Toner for non-magnetic one-component developer, method of preparing the toner, developer and image forming method (2012-12-11),
15. 8192910 - Image forming method, image forming apparatus and process cartridge (2012-06-05),

Title: Innovations of Hideaki Yasunaga in the Realm of Imaging Technology

Introduction

Hideaki Yasunaga, an accomplished inventor based in Ibaraki, Japan, has made significant contributions to the field of imaging technology with an impressive portfolio of 50 patents. His innovative work has led to advancements in seamless belts and developing rollers, which play vital roles in image forming apparatuses.

Latest Patents

Among Hideaki Yasunaga's latest patents are groundbreaking inventions that include:

1. **Composition for Seamless Belt**: This composition comprises a thermoplastic resin and a conductive agent. Notably, a liquid extracted from the composition using methanol presents an intensity of no greater than 7×10 in a total ion chromatogram, showcasing its unique properties.

2. **Developing Roller, Process Cartridge, Image Forming Apparatus, and Image Forming Method**: This patent details a developing roller featuring a shaft body with an elastic layer and a surface layer made of polyurethane. The surface layer contains a reaction product of a fluoroethylene vinyl ether copolymer and an isocyanurate form of isocyanate. With a film thickness ranging from 0.5 µm to 2.0 µm and grooves at a circumferential angle of 0 to 30 degrees, this developing roller enhances the performance of image forming systems.

Career Highlights

Hideaki Yasunaga's career includes stints at notable companies such as Ricoh Company, Ltd. and Minolta Company, Ltd. His work at these organizations has been instrumental in driving innovation in imaging technologies, paving the way for advancements in printing and processing of images.

Collaborations

Throughout his career, Yasunaga has collaborated with esteemed colleagues like Yoshihiro Mikuriya and Masayuki Hagi. Their teamwork has fostered a creative environment that has led to the development of cutting-edge technologies and patents.

Conclusion

In summary, Hideaki Yasunaga stands out as a prolific inventor in the field of imaging technology. His 50 patents reflect his commitment to innovation and excellence, underscoring his impact on the industry and the future of image processing solutions.

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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