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For the Inventor, By the Inventor

Kanagawa, Japan

Ryoji Kawasaki

This inventor holds 6 USPTO granted patents. Top assignees: Kabushiki Kaisha Toshiba, Nec Corporation, Nippon Telegraph and Telephone Corporation. Active years: 1987-2017.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Ryoji Kawasaki. Retrieved from https://idiyas.com/inventor/ryoji-kawasaki

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

USPTO Granted Patents = 6

% Patents Active = 100.0

Average Co-Inventor Count = 4.5

ph-index = 5

Forward Citations = 235(Granted Patents)


Location History:

  • Tokyo, JP (1989 - 1991)
  • Kanagawa, JP (1987 - 2017)

Company Filing History:

goldMedal5 out of 53,262 
 
Kabushiki Kaisha Toshiba
 patents
silverMedal5 out of 36,684 
 
Nec Corporation
 patents
bronzeMedal3 out of 5,300 
 
Nippon Telegraph and Telephone Corporation
 patents
4. 2 out of 522 
 
Nippon Telegraph and Telephone Public Corporation
 patents
5. 1 out of 11,665 
 
Fuji Xerox Co., Ltd.
 patents
where one patent can have more than one assignee

Years Active: 1987-2017

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6 patents (USPTO):Explore Patents
1. 9829827 - Developer container and image forming apparatus (2017-11-28),
2. 4991198 - Interconnection control method in cordless telephone system (1991-02-05),
3. 4876708 - Cordless telephone system (1989-10-24),
4. 4875231 - Radio telephone system (1989-10-17),
5. 4736461 - Method of transmitting terminating call signals within a restricted (1988-04-05),
6. 4679244 - Method of transmitting terminating call signals within a restricted (1987-07-07),

Title: Ryoji Kawasaki: Innovator in Developer Technology

Introduction

Ryoji Kawasaki is a notable inventor based in Kanagawa, Japan. He has made significant contributions to the field of developer technology, holding a total of 6 patents. His work has been instrumental in advancing the functionality and efficiency of various imaging systems.

Latest Patents

Among his latest patents is the "Developer Container and Image Forming Apparatus." This invention features a container body designed to hold developer material, which can be easily attached to and removed from an apparatus body. The container includes a discharge port for the developer, an opening-and-closing member that operates in response to the attachment and removal of the container, and two elastic members that ensure a proper seal and functionality. Another significant patent is the "Interconnection Control Method in Cordless Telephone System," which showcases his innovative approach to communication technology.

Career Highlights

Ryoji Kawasaki has worked with prominent companies such as NEC Corporation and Kabushiki Kaisha Toshiba. His experience in these organizations has allowed him to develop and refine his inventions, contributing to the technological advancements in the industry.

Collaborations

Throughout his career, Ryoji has collaborated with esteemed colleagues, including Noboru Saegusa and Akio Yotsutani. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies.

Conclusion

Ryoji Kawasaki's contributions to the field of developer technology and his innovative patents highlight his role as a significant inventor. His work continues to influence the industry and inspire future innovations.

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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