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For the Inventor, By the Inventor

Yokohama, Japan

Norifumi Muranaka

This inventor holds 22 USPTO granted patents and 9 published patent applications and 14 EPO patents, primarily in Electrophotography. Top assignee: Canon Kabushiki Kaisha. Active years: 2012-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Norifumi Muranaka. Retrieved from https://idiyas.com/inventor/norifumi-muranaka

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

USPTO Granted Patents = 22 

% Patents Active = 77.3

 

Average Co-Inventor Count = 5.2

ph-index = 18

Forward Citations = 700(Granted Patents)


Location History:

  • Mishima, JP (2012 - 2015)
  • Yokohama, JP (2014 - 2022)

Company Filing History:

goldMedal22 out of 92,994 
 
Canon Kabushiki Kaisha
 patents

Years Active: 2012-2026

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Areas of Expertise:
Electrophotographic Apparatus
Process Cartridge
Electroconductive Member
Conductive Member
Ionic Electro-conductive Resin
Electrically Conducting Member
Dual Rubber Elastic Layer
Surface Layer
Porous Body
Image Forming Apparatus
22 patents (USPTO):Explore Patents
1. 12547087 - Electrophotographic apparatus and process cartridge (2026-02-10),
2. 11307509 - Electro-conductive member, method for producing same, process cartridge and electrophotographic image forming apparatus (2022-04-19),
3. 10996581 - Conductive member (2021-05-04),
4. 10018927 - Electroconductive member for electrophotography, process cartridge and electrophotographic apparatus (2018-07-10),
5. 10012924 - Electrophotographic electro-conductive member having a dual rubber elastic layer, method of producing the same, process cartridge, and electrophotographic apparatus (2018-07-03),
6. 9958802 - Electroconductive member for electrophotography, process cartridge, and electrophotographic apparatus (2018-05-01),
7. 9811021 - Conductive member (2017-11-07),
8. 9651888 - Electroconductive member with a surface layer including a porous body having a continuous open pore (2017-05-16),
9. 9551949 - Electroconductive member for electrophotography, process cartridge, and electrophotographic apparatus (2017-01-24),
10. 9547250 - Electroconductive member for electrophotography, process cartridge and electrophotographic apparatus (2017-01-17),
11. 9541854 - Electroconductive member for electrophotography, process cartridge, and electrophotographic apparatus (2017-01-10),
12. 9146482 - Electroconductive member for electrophotography, process cartridge, and electrophotographic apparatus (2015-09-29),
13. 9128403 - Electrophotographic electrically conductive member (2015-09-08),
14. 9086643 - Ionic electro-conductive resin and electro-conductive member for electrophotography (2015-07-21),
15. 9023465 - Electroconductive member, process cartridge and electrophotographic image forming apparatus (2015-05-05),

Title: Norifumi Muranaka: Innovator in Electro-conductive Technology

Introduction

Norifumi Muranaka is an accomplished inventor based in Yokohama, Japan, with a remarkable portfolio of 21 patents to his name. His innovations primarily focus on electro-conductive technologies, significantly contributing to advancements in the field.

Latest Patents

Muranaka's latest patents include developments in electro-conductive members, methods for producing these members, process cartridges, and electrophotographic image forming apparatuses. Notably, his electro-conductive layer features a matrix-domain structure. This structure comprises a first rubber matrix with domains containing a second rubber and electro-conductive particles. His patents detail unique specifications regarding the ratios of electro-conductive particle cross-sectional areas, optimizing the performance and durability of these conductive members. The innovative conductive member is designed to minimize changes in its electrical resistance over time, enhancing reliability in long-term applications.

Career Highlights

Muranaka is proudly associated with Canon Kabushiki Kaisha, a global leader in imaging and printing technologies. Throughout his career at Canon, he has played a pivotal role in pioneering various technologies that provide enhanced solutions for digital imaging systems.

Collaborations

In his professional journey, Muranaka has collaborated with esteemed colleagues such as Kazuhiro Yamauchi and Yuichi Kikuchi. Together, they have combined their expertise to drive forward innovative projects, emphasizing teamwork in the advancement of electronic applications.

Conclusion

Norifumi Muranaka’s contributions to the field of electro-conductive technology have positioned him as a notable inventor in Japan's innovation landscape. His ongoing work continues to influence the development of reliable and efficient electro-conductive materials, ensuring that technologies meet the evolving demands of the market.

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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