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For the Inventor, By the Inventor

Numazu, Japan

Ryoichi Ito

This inventor holds 4 USPTO granted patents. Top assignee: Ricoh Company, Ltd.. Active years: 2001-2003.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Ryoichi Ito. Retrieved from https://idiyas.com/inventor/ryoichi-ito-5milwvyj

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

USPTO Granted Patents = 4

% Patents Active = 100.0

Average Co-Inventor Count = 7.0

ph-index = 4

Forward Citations = 83(Granted Patents)


Location History:

  • Shizuoka, JP (2001 - 2002)
  • Numazu, JP (2003)

Company Filing History:

goldMedal4 out of 28,951 
 
Ricoh Company, Ltd.
 patents

Years Active: 2001-2003

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4 patents (USPTO):Explore Patents
1. 6503681 - Process for the production of toner for developing electrostatic image (2003-01-07),
2. 6368765 - Method of producing toner for developing latent electrostatic images (2002-04-09),
3. 6258502 - Two-component developer, two-component developer holding container, and electrophotographic image formation apparatus equipped with the container (2001-07-10),
4. 6183926 - Toner and two-component developer for electrophotographic process and image formation method and image formation apparatus using the toner (2001-02-06),

Title: Ryoichi Ito: Innovator in Toner Production Technology

Introduction

Ryoichi Ito is a notable inventor based in Numazu, Japan. He has made significant contributions to the field of toner production for developing electrostatic images. With a total of 4 patents to his name, Ito's work has had a considerable impact on the industry.

Latest Patents

Ryoichi Ito's latest patents include a process for the production of toner for developing electrostatic images. This two-step process involves a first pulverizing step where a toner composition containing a binder and a coloring agent is pulverized to obtain preliminarily pulverized particles. These particles have a weight average particle diameter of 20-100 µm and contain no more than 50% by weight of particles with a roundness of 0.90 or less. The second pulverizing step finely pulverizes these preliminarily pulverized particles to achieve finely pulverized particles with a weight average particle diameter of 5-13 µm. This step ensures that no more than 30% by weight of particles have a roundness of 0.90 or less and no more than 15% of particles have a diameter of 5 µm or less.

Another significant patent by Ito is a method of producing toner for developing latent electrostatic images. These innovations reflect his expertise and dedication to improving toner production processes.

Career Highlights

Ryoichi Ito is currently employed at Ricoh Company, Ltd., where he continues to develop and refine technologies related to toner production. His work has been instrumental in advancing the capabilities of electrostatic imaging technologies.

Collaborations

Ito has collaborated with notable colleagues such as Yasuaki Iwamoto and Noboru Kuroda. Their combined efforts have contributed to the success of various projects within the company.

Conclusion

Ryoichi Ito's contributions to toner production technology exemplify his innovative spirit and commitment to excellence. His patents and ongoing work at Ricoh Company, Ltd. continue to shape the future of electrostatic imaging.

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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