Nara, Japan

Kiyoshi Toizumi

This inventor holds 32 USPTO granted patents and 1 published patent application, primarily in Image Forming Technology. Top assignee: Sharp Kabushiki Kaisha Corporation. Active years: 1997-2021.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kiyoshi Toizumi. Retrieved from https://idiyas.com/inventor/kiyoshi-toizumi

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

USPTO Granted Patents = 32 

% Patents Active = 71.9

Average Co-Inventor Count = 3.9

ph-index = 8

Forward Citations = 144(Granted Patents)


Location History:

  • Yamatokoriyama, JP (1997 - 2000)
  • Yamatokooriyama, JP (1999 - 2000)
  • Chiba, JP (1997 - 2001)
  • Nara, JP (2002 - 2013)
  • Osaka, JP (2013)
  • Sakai, JP (2021)

Company Filing History:


Years Active: 1997-2021

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Areas of Expertise:
Image Forming Apparatus
Toner Adhesion
Developing Device
Electrophotographic Toner
Charging Method
Two-Component Developer
Cylindrical Toner Particles
Transfer Drum
Fixing Device
Traveling-Wave Electric Field
Progressive Wave Electric Field
Printing Apparatus
32 patents (USPTO):Explore Patents

Title: The Innovative Mind of Kiyoshi Toizumi

Introduction

Kiyoshi Toizumi, a prominent inventor based in Nara, Japan, has made remarkable contributions to technology with an impressive portfolio of 32 patents. His work primarily focuses on multifunctional devices and methods that enhance efficiency and user experience.

Latest Patents

Among his latest inventions is a patented multifunctional apparatus that incorporates an external recording medium slot positioned above the touch area. This innovative design ensures that users can conveniently interact with the device without obstruction. Additionally, Toizumi has patented a device and method for measuring toner adhesion, which significantly improves the accuracy in assessing toner adhesion to carrier materials. This device features a developer holding section using magnetism, an airflow supply section, and a dedicated toner detection system, enabling reliable and reproducible measurements.

Career Highlights

Kiyoshi Toizumi is employed at Sharp Corporation, where his inventive spirit has flourished. His expertise has not only contributed to the company’s innovative products but also to the advancement of technology in the field of multifunctional devices and measuring systems.

Collaborations

Throughout his career, Toizumi has collaborated with fellow experts in the industry, including Taisuke Kamimura and Fumio Shimazu. These partnerships have fostered an environment of innovation and creativity, further driving advancements in the technologies they develop.

Conclusion

Kiyoshi Toizumi's dedication to innovation and creation has positioned him as a key figure in the technological landscape. His inventive work at Sharp Corporation and his collaborative efforts have led to significant advancements in device functionality and measurement accuracy, holding promise for future developments in the industry.

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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