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For the Inventor, By the Inventor

Tokyo, Japan

Shuji Hirai

This inventor holds 60 USPTO granted patents and 3 published patent applications and 7 EPO patents, primarily in Image Forming Technology (CPC class G03G). Top assignees: Ricoh Company, Ltd., Furukawa Automotive Systems Inc., The Furukawa Electric Co., Ltd.. Active years: 2004-2020.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Shuji Hirai. Retrieved from https://idiyas.com/inventor/shuji-hirai

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

USPTO Granted Patents = 60 

% Patents Active = 40.0

 

Average Co-Inventor Count = 3.1

ph-index = 11

Forward Citations = 309(Granted Patents)

Forward Citations (Not Self Cited) = 229(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Ota-ku, JP (2004 - 2006)
  • Shiga, JP (2014 - 2015)
  • Ohta-ku, JP (2005 - 2016)
  • Inukami-gun, JP (2019)
  • Tokyo, JP (2006 - 2020)

Company Filing History:

goldMedal55 out of 28,940 
 
Ricoh Company, Ltd.
 patents
silverMedal5 out of 254 
 
Furukawa Automotive Systems Inc.
 patents
bronzeMedal5 out of 2,643 
 
The Furukawa Electric Co., Ltd.
 patents
4. 1 out of 2,030 
 
Kabushiki Kaisha Tokai Rika Denki Seisakusho
 patents
5. 1 out of 38,912 
 
Toyota Jidosha Kabushiki Kaisha
 patents
where one patent can have more than one assignee

Years Active: 2004-2020

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Areas of Expertise:
Image Density Control
Toner Supply Management
Rotary Connector
Image Forming Apparatus
Uneven Image Density
Developing Device
Charging Power Adjustment
Voltage Output Adjustment
Correction Data Generation
Smoothness Detector
Fluctuation Prevention
Gradation Correction
60 patents (USPTO):Explore Patents
1. 10587085 - Rotary connector and fixing structure of rotary connector (2020-03-10),
2. 10474056 - Image forming apparatus (2019-11-12),
3. 10439348 - Rotary connector device (2019-10-08),
4. 10401763 - Image forming apparatus (2019-09-03),
5. 9996037 - Image forming apparatus and image forming method which cyclically change a charging power and a developing bias applied to a developer bearer (2018-06-12),
6. 9857747 - Image forming apparatus that adjusts a voltage output based on toner adhesion (2018-01-02),
7. 9778593 - Image forming apparatus (2017-10-03),
8. 9727001 - Technique for reducing uneven image density in an image forming apparatus (2017-08-08),
9. 9671716 - Image forming apparatus and correction data generation method which corrects the intensity of a light source which forms a latent image (2017-06-06),
10. 9557697 - Recording media smoothness detector and image forming apparatus incorporating same (2017-01-31),
11. 9423752 - Image forming apparatus and method adjusting image forming condition (2016-08-23),
12. 9411278 - Image forming apparatus (2016-08-09),
13. 9400442 - Image forming apparatus (2016-07-26),
14. 9348288 - Image forming apparatus forming a plurality of displaced test latent image parts (2016-05-24),
15. 9250592 - Image forming apparatus having a smoothness detector (2016-02-02),

Certainly! Here is the article for inventor Shuji Hirai:

Title: Shuji Hirai: Pioneering Innovator in Technology

Introduction:

Shuji Hirai, a renowned inventor based in Tokyo, Japan, has proven himself as a trailblazer in the world of technology. With a remarkable passion for innovation and a relentless pursuit of pushing boundaries, he continues to inspire future generations of inventors to think boldly and create fearlessly.

Latest Patents:

Among his impressive portfolio of 60 patents, Shuji Hirai's latest inventions include a Rotary Connector and a Fixing Structure of Rotary Connector. These innovations aim to prevent loosening and lifting of rotary connectors in harness wiring, thereby reducing inconveniences such as abnormal sounds caused by contact with a steering wheel. Additionally, his Image Forming Apparatus optimizes writing intensity to correct uneven toner image density based on detection values.

Career Highlights:

Throughout his career, Shuji Hirai has made significant contributions to technology at companies like Ricoh Company, Ltd. and The Furukawa Electric Co., Ltd. His expertise and groundbreaking inventions have helped drive advancements in various industries, solidifying his reputation as a true visionary.

Collaborations:

Shuji Hirai has collaborated with notable colleagues such as Satoshi Kaneko and Katsuaki Miyawaki. Together, they have worked on innovative projects that have pushed the boundaries of technological possibilities and set new standards for excellence in the industry.

Conclusion:

In conclusion, Shuji Hirai's unwavering dedication to innovation and his remarkable contributions to the world of technology have established him as a pioneering inventor. His inventions not only solve practical problems but also pave the way for future advancements. Shuji Hirai's legacy will undoubtedly continue to inspire generations of inventors to dream big and revolutionize the world through their creations.

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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