Miyagi, Japan

Keiichi Chiba

This inventor holds 9 USPTO granted patents. Top assignees: Tohoku Ricoh Co., Ltd., Ricoh Company, Ltd.. Active years: 1991-2007.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Keiichi Chiba. Retrieved from https://idiyas.com/inventor/keiichi-chiba-fnww4vgw

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

Calculating rank

% Patents Active = 88.9

Average Co-Inventor Count = 2.1

ph-index = 3

Forward Citations = 39(Granted Patents)


Location History:

  • Iwanuma, JP (1991 - 2004)
  • Miyagi, JP (2002 - 2007)

Company Filing History:


Years Active: 1991-2007

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9 patents (USPTO):Explore Patents

Title: Keiichi Chiba: Innovator in Printer Technology

Introduction

Keiichi Chiba is a notable inventor based in Miyagi, Japan. He has made significant contributions to the field of printing technology, holding a total of 9 patents. His innovative designs have improved the efficiency and quality of printing processes.

Latest Patents

Chiba's latest patents include a unique printer design that features a timing belt passed over drive pulleys, which are mounted on specific print drums. This design incorporates phase adjusting means and deflection pulleys, allowing for a more precise operation. The deflection pulleys rotate in contact with the rear surface of the timing belt, which is ground to a uniform thickness. This innovation eliminates deviations in relative phase and offset ghosts caused by irregular thickness, all while maintaining a cost-effective configuration.

Another notable patent is a printer capable of producing multicolor images in a single pass. This printer includes multiple print drums, each equipped with drum drive gears that allow for easy replacement. The interlocking print drums are connected through rotatable members, ensuring that the number of rotations is an integral multiple, enhancing the overall printing efficiency.

Career Highlights

Throughout his career, Keiichi Chiba has worked with prominent companies such as Tohoku Ricoh Co., Ltd. and Ricoh Company, Ltd. His experience in these organizations has allowed him to refine his skills and contribute to advancements in printing technology.

Collaborations

Chiba has collaborated with several talented individuals in the industry, including Hironobu Takasawa and Yoshinobu Sai. These partnerships have fostered innovation and creativity in his projects.

Conclusion

Keiichi Chiba's contributions to printer technology through his patents and collaborations highlight his role as a significant inventor in the field. His work continues to influence the printing industry, showcasing the importance of innovation in 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]
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