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Shinichiro Yagi

This inventor holds 51 USPTO granted patents and 11 EPO patents, primarily in Electrophotography Technology (CPC class G03G). Top assignees: Ricoh Company, Ltd., Shizuoka University. Active years: 1999-2015.

USPTO Granted Patents = 51

% Patents Active = 70.6

EPO Patents = 11 (Patent Applications = 1)

Average Co-Inventor Count = 6.2

ph-index = 17

Forward Citations = 763(Granted Patents)

Forward Citations (Not Self Cited) = 669(Dec 10, 2025)

Inventors with similar research interests:

Location History:

Numazu, JP (1999 - 2012)
Shizuoka-ken, JP (2005 - 2012)
Shizuoka, JP (2004 - 2015)

Company Filing History:

where one patent can have more than one assignee

Years Active: 1999-2015

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Areas of Expertise:

Electrophotography

Toner

Developer

Image Forming Apparatus

Process Cartridge

Carrier

Fixing Device

Electrostatic Image

Developer Container

Image Forming Method

Two Component Developer

Dry Toner

51 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 9152064 - Method of preparing developer, developer for electrophotography, process cartridge and image forming apparatus (2015-10-06),

2. 8968976 - Method for regenerating carrier core material for electrophotography, method for manufacturing carrier for electrophotography, and carrier for electrophotography (2015-03-03),

3. 8722305 - Method of preparing carrier for electrophotography (2014-05-13),

4. 8697326 - Method of manufacturing a carrier, a carrier, a development agent, and a process cartridge (2014-04-15),

5. 8647804 - Method of preparing carrier for electrophotography, carrier for electrophotography, developer for electrophotography, process cartridge and image forming apparatus (2014-02-11),

6. 8268526 - Toner, developer and image forming apparatus (2012-09-18),

7. 8247149 - Electrophotographic developer carrier, electrophotographic developer, image forming method, process cartridge and image forming apparatus (2012-08-21),

8. 8213833 - Image forming apparatus, process cartridge, image forming method and developer for electrophotography (2012-07-03),

9. 8086143 - Image forming apparatus for use with carrier including a core and cover layer (2011-12-27),

10. 8026032 - Carrier, supplemental developer, developer in image developer, developer feeding apparatus, image forming apparatus and process cartridge (2011-09-27),

11. 7835677 - Developing device, image forming apparatus, and process cartridge (2010-11-16),

12. 7736826 - Toner, developer and image forming apparatus (2010-06-15),

13. 7702271 - Fixing device, and image forming apparatus using the fixing device (2010-04-20),

14. 7592116 - Indium-containing carrier for electrophotography, developer using the same, and developer container (2009-09-22),

15. 7563555 - Toner, developer including the toner, and method for fixing toner image (2009-07-21),

Title: Shinichiro Yagi: Innovator in Electrophotography

Introduction

Shinichiro Yagi, based in Numazu, Japan, is a prolific inventor with an impressive portfolio of 51 patents. His groundbreaking work primarily focuses on methods and developments in electrophotography, contributing significantly to advancements in this technological field.

Latest Patents

Among his latest innovations, Yagi has developed a "Method of Preparing Developer" that involves mixing a carrier and powder while utilizing gravity. Additionally, he has created a "Method for Regenerating Carrier Core Material for Electrophotography," which treats carrier materials with an aqueous solution containing an oxidant under specific conditions to enhance their properties. Furthermore, his patent on "Manufacturing Carrier for Electrophotography" focuses on improving the capabilities and efficiency of developer materials used in imaging technologies.

Career Highlights

Yagi has made substantial contributions during his tenure at prestigious organizations such as Ricoh Company, Ltd. and National University Corporation Shizuoka University. His role within these institutions allowed him to leverage his expertise in developing innovative solutions that have advanced the field of electrophotography.

Collaborations

Throughout his career, Yagi has collaborated with esteemed colleagues such as Toshiki Nanya and Shigeru Emoto. These partnerships have resulted in the exchange of ideas and knowledge, leading to the successful development of numerous patents and advancements in the technology.

Conclusion

Shinichiro Yagi's contributions to the field of electrophotography through his impressive patent portfolio exemplify his role as a significant inventor. His innovative methods for preparing developers and regenerating carrier materials continue to influence the technology positively, ensuring his legacy within the industry remains impactful.

Profile summary based on public USPTO records.

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