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For the Inventor, By the Inventor

Mishima, Japan

Takashi Koyanagi

This inventor holds 14 USPTO granted patents and 2 published patent applications and 8 EPO patents. Top assignee: Canon Kabushiki Kaisha. Active years: 2014-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Takashi Koyanagi. Retrieved from https://idiyas.com/inventor/takashi-koyanagi

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

USPTO Granted Patents = 14 

% Patents Active = 92.9

 

Average Co-Inventor Count = 3.9

ph-index = 8

Forward Citations = 190(Granted Patents)


Location History:

  • Mishima, JP (2014 - 2021)
  • Shizuoka, JP (2024)

Company Filing History:

goldMedal14 out of 92,994 
 
Canon Kabushiki Kaisha
 patents

Years Active: 2014-2025

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14 patents (USPTO):Explore Patents
1. 12405550 - Developing device, process cartridge, and electrophotographic image forming apparatus (2025-09-02),
2. 12147170 - Image forming apparatus having toner charging (2024-11-19),
3. 11966174 - Electrophotographic member, electrophotographic process cartridge, and electrophotographic image forming apparatus (2024-04-23),
4. 11156935 - Developing member, electrophotographic process cartridge, and electrophotographic image forming apparatus (2021-10-26),
5. 11029622 - Developer carrying member, process cartridge, and electrophotographic apparatus (2021-06-08),
6. 10831125 - Developer carrying member, process cartridge, and electrophotographic apparatus (2020-11-10),
7. 10331054 - Electrophotographic member, process cartridge and electrophotographic image forming apparatus (2019-06-25),
8. 10197930 - Electrophotographic member, process cartridge, and electrophotographic apparatus (2019-02-05),
9. 9977359 - Electrophotographic member, method of producing the same, process cartridge, and electrophotographic apparatus (2018-05-22),
10. 9625854 - Developer carrying member, electrophotographic process cartridge, and electrophotographic image forming apparatus (2017-04-18),
11. 8874012 - Developing member, process cartridge and electrophotographic apparatus (2014-10-28),
12. 8798508 - Developing member, process cartridge, and electrophotographic apparatus (2014-08-05),
13. 8768226 - Developer support member, electrophotographic process cartridge and electrophotographic image forming apparatus (2014-07-01),
14. 8655222 - Developing member, process cartridge, and electrophotographic image forming apparatus (2014-02-18),

Title: The Innovative Contributions of Takashi Koyanagi

Introduction

Takashi Koyanagi is a prominent inventor based in Mishima, Japan. He has made significant contributions to the field of electrophotographic technology, holding a total of 14 patents. His work has been instrumental in advancing the efficiency and effectiveness of image forming apparatuses.

Latest Patents

Koyanagi's latest patents include a developing device and an image forming apparatus. The developing device features a developer and a developing member designed to carry the developer on its surface. This device incorporates an electro-conductive substrate and a single-layer elastic layer, which consists of a binder resin containing both crosslinked urethane and acrylic resins. This unique composition forms an interpenetrating polymer network structure, enhancing the device's performance. Additionally, his image forming apparatus includes a developer carrying member that bears and conveys developer, with innovative features for toner charging that improve the overall image quality.

Career Highlights

Koyanagi has dedicated his career to Canon Kabushiki Kaisha, where he has played a vital role in developing cutting-edge technologies. His expertise in electrophotographic systems has led to numerous advancements in the industry, making him a key figure in the field.

Collaborations

Throughout his career, Koyanagi has collaborated with talented individuals such as Masaki Yamada and Shohei Urushihara. These partnerships have fostered innovation and contributed to the success of various projects within Canon.

Conclusion

Takashi Koyanagi's contributions to the field of electrophotographic technology are noteworthy and impactful. His innovative patents and dedication to his work at Canon Kabushiki Kaisha highlight his importance as an inventor in the industry.

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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