logo

For the Inventor, By the Inventor

Shizuoka, Japan

Kohkoku Ri

This inventor holds 11 USPTO granted patents. Top assignees: Ricoh Company, Ltd., Hodogaya Chemical Co., Ltd., Other. Active years: 2001-2006.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kohkoku Ri. Retrieved from https://idiyas.com/inventor/kohkoku-ri

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

Calculating rank
USPTO Granted Patents = 11

% Patents Active = 72.7

Average Co-Inventor Count = 5.8

ph-index = 10

Forward Citations = 249(Granted Patents)


Location History:

  • Shizouka, JP (2001)
  • Shizuoka-ken, JP (2002)
  • Numazu, JP (2003)
  • Shizuoka, JP (2001 - 2006)

Company Filing History:

goldMedal10 out of 28,957 
 
Ricoh Company, Ltd.
 patents
silverMedal1 out of 328 
 
Hodogaya Chemical Co., Ltd.
 patents
bronzeMedal1 out of 834,601 
Other
 patents
where one patent can have more than one assignee

Years Active: 2001-2006

Loading Chart...
11 patents (USPTO):Explore Patents
1. 7071285 - Aromatic polycarbonate resin, electrophotographic photoconductor, process cartridge, and electrophotographic image forming method and apparatus (2006-07-04),
2. 6919419 - AROMATIC BLOCK POLYCARBONATE RESIN, DIPHENOL COMPOUND FOR PREPARATION OF THE POLYCARBONATE RESIN, ELECTRO-PHOTOGRAPHIC PHOTOCONDUCTOR, ELECTRO-PHOTOGRAPHIC IMAGE FORMING APPARATUS AND PROCESS, AND PROCESS CARTRIDGE (2005-07-19),
3. 6790571 - Aromatic polycarbonate resin, electrophotographic photoconductor, process cartridge, and electrophotographic image forming method and apparatus (2004-09-14),
4. 6664361 - Diphenol compound, aromatic polycarbonate and electrophotoconductive photoconductor (2003-12-16),
5. 6576386 - AROMATIC BLOCK POLYCARBONATE RESIN, DIPHENOL COMPOUND FOR PREPARATION OF THE POLYCARBONATE RESIN, ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR, ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS AND PROCESS, AND PROCESS CARTRIDGE (2003-06-10),
6. 6486293 - Electrophotographic photoconductor and method of producing aromatic polycarbonate resin for use in the photoconductor (2002-11-26),
7. 6444387 - Image bearing material, electrophotographic photoreceptor using the image bearing material, and image forming apparatus using the photoreceptor (2002-09-03),
8. 6303736 - Electrophotographic photoconductor and aromatic polycarbonate resin for use in the photoconductor (2001-10-16),
9. 6210848 - Electrophotographic photoconductor, and process cartridge and image forming apparatus using the same (2001-04-03),
10. 6187494 - Electrophotographic photoconductor and aromatic polycarbonate resin for use in the photoconductor (2001-02-13),
11. 6187492 - Electrophotographic photoconductor and method of producing aromatic polycarbonate resin for use in the photoconductor (2001-02-13),

Title: Kohkoku Ri: Innovator in Electrophotographic Technology

Introduction

Kohkoku Ri is a prominent inventor based in Shizuoka, Japan, known for his significant contributions to the field of electrophotographic technology. With a total of 11 patents to his name, he has made remarkable advancements in materials used for photoconductors and image forming methods.

Latest Patents

His latest patents include innovations such as an aromatic polycarbonate resin, an electrophotographic photoconductor, a process cartridge, and an electrophotographic image forming method and apparatus. The electrophotographic photoconductor features an electroconductive support and a photoconductive layer that contains an aromatic polycarbonate resin with specific structural units. These innovations are crucial for enhancing the performance and efficiency of electrophotographic devices.

Career Highlights

Kohkoku Ri has worked with notable companies, including Ricoh Company, Ltd. His work has significantly impacted the development of electrophotographic technologies, leading to improved products in the market.

Collaborations

He has collaborated with esteemed colleagues such as Kazukiyo Nagai and Masaomi Sasaki, contributing to the advancement of technology in his field.

Conclusion

Kohkoku Ri's innovative work in electrophotographic technology and his numerous patents highlight his role as a key figure in the industry. His contributions continue to influence advancements in imaging technology.

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]
Loading…