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For the Inventor, By the Inventor

Osaka, Japan

Yasuyuki Ishiguro

This inventor holds 53 USPTO granted patents and 10 published patent applications, primarily in Image Forming Apparatus (CPC class G03G). Top assignees: Sharp Kabushiki Kaisha Corporation, Mita Industrial Co., Ltd.. Active years: 1988-2019.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yasuyuki Ishiguro. Retrieved from https://idiyas.com/inventor/yasuyuki-ishiguro

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

USPTO Granted Patents = 53 

% Patents Active = 67.9

Average Co-Inventor Count = 3.9

ph-index = 11

Forward Citations = 371(Granted Patents)

Forward Citations (Not Self Cited) = 363(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Osaka-fu, JP (2002)
  • Higashiosaka, JP (1999 - 2012)
  • Osaka, JP (1988 - 2016)
  • Sakai, JP (2018 - 2019)

Company Filing History:

goldMedal44 out of 25,954 
 
Sharp Kabushiki Kaisha Corporation
 patents
silverMedal9 out of 1,344 
 
Mita Industrial Co., Ltd.
 patents

Years Active: 1988-2019

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Areas of Expertise:
Image Forming Apparatus
Toner Cartridge
Developing Device
Toner Supply Device
Waste Developer Collecting Device
Toner Transport Device
Environmental Certification
Cartridge Position Detector
Replenishing Apparatus
Agitating Element
Detection Mechanism
Ordering System
53 patents (USPTO):Explore Patents
1. 10466624 - Toner cartridge and image forming apparatus (2019-11-05),
2. 9992369 - Image forming apparatus having display section displaying environmental certification information during startup and being foldable into a generally flush accommodated state (2018-06-05),
3. 9291988 - Image forming apparatus including cartridge position detector (2016-03-22),
4. 9152967 - Image forming apparatus, consumables ordering system and consumables ordering method (2015-10-06),
5. 8731441 - Charging roller and image forming apparatus (2014-05-20),
6. 8730494 - Image forming apparatus including display device (2014-05-20),
7. 8724129 - Image forming apparatus, system for ordering optional device, and method for ordering optional device (2014-05-13),
8. 8532523 - Toner cartridge having a toner flowing-out preventing member and image forming apparatus using the same (2013-09-10),
9. 8417160 - Toner cartridge including a toner flowing-out preventing valve (2013-04-09),
10. 8412077 - Developing device and image forming apparatus using the same (2013-04-02),
11. 8270882 - Developing device and image forming apparatus using the same (2012-09-18),
12. 8238797 - Toner cartridge and image forming apparatus using the same (2012-08-07),
13. 8099014 - Image forming apparatus (2012-01-17),
14. 8095049 - Toner cartridge and image forming apparatus using the same (2012-01-10),
15. 7925182 - Image forming apparatus (2011-04-12),

Title: The Innovative Contributions of Yasuyuki Ishiguro

Introduction: Yasuyuki Ishiguro, based in Osaka, Japan, is a renowned inventor with a remarkable portfolio of 53 patents. His inventions primarily focus on enhancing the efficiency and functionality of imaging and toner technologies.

Latest Patents: Among his latest patents is an advanced toner cartridge design that features a screw mechanism for delivering stirred toner to an outlet. This design includes a partition that separates the screw from a toner stirrer, creating a closed space that optimizes toner dispensing. Another noteworthy invention is an image forming apparatus that boasts a display section capable of presenting environmental certification information at startup. This apparatus is designed to fold into a compact form while ensuring seamless operation when accepting user instructions.

Career Highlights: Yasuyuki Ishiguro's career includes significant tenures at notable companies such as Sharp Corporation and Mita Industrial Co., Ltd. His engineering expertise and inventive spirit have driven his contributions to the field of imaging technology, making a substantial impact on how these devices operate.

Collaborations: Throughout his career, Ishiguro has collaborated with several talented professionals, including Jun Yamaguchi and Toshio Nishino. These partnerships have enriched his innovative work, allowing for the exchange of ideas and collaborative development on various projects.

Conclusion: Yasuyuki Ishiguro's dedication to innovation and improvement in imaging technologies positions him as an influential figure in his field. With numerous patents to his name, his contributions continue to pave the way for advancements that enhance functionality and efficiency in imaging systems.

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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