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For the Inventor, By the Inventor

Kanagawa, Japan

Shigeru Sadamatsu

This inventor holds 11 USPTO granted patents. Top assignee: Fuji Xerox Co., Ltd.. Active years: 1976-1991.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Shigeru Sadamatsu. Retrieved from https://idiyas.com/inventor/shigeru-sadamatsu

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

USPTO Granted Patents = 11

% Patents Active = 100.0

Average Co-Inventor Count = 2.2

ph-index = 6

Forward Citations = 124(Granted Patents)


Location History:

  • Minami-ashigara, JA (1976)
  • Tokyo, JA (1976)
  • Minami-ashigara, JP (1979 - 1982)
  • Ebina, JP (1982)
  • Kanagawa, JP (1982 - 1991)

Company Filing History:

goldMedal11 out of 11,665 
 
Fuji Xerox Co., Ltd.
 patents

Years Active: 1976-1991

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11 patents (USPTO):Explore Patents
1. 5037717 - Developer composition for electrophotography comprising fine particles (1991-08-06),
2. 4943505 - Developer and toner composition produced by emulsion polymerization (1990-07-24),
3. 4933253 - Electrophotographic developer comprising toner particles and acrylic (1990-06-12),
4. 4365274 - One-dimensional image sensor (1982-12-21),
5. 4346159 - Photosensitive element for electrophotography (1982-08-24),
6. 4315980 - Electrophotographic member with metallocene containing overlayer (1982-02-16),
7. 4245022 - Dry electrophotographic developers (1981-01-13),
8. 4197119 - Electrophotographic process (1980-04-08),
9. 4170476 - Layered photoconductive element having As and/or Te doped with Ga, In or (1979-10-09),
10. 3941898 - Developing method utilizing pulverized, colored, crosslinked, vinylic (1976-03-02),
11. 3936183 - Electrophotographic copying machine with improved cleaning blade (1976-02-03),

Title: Innovations of Shigeru Sadamatsu in Electrophotography

Introduction

Shigeru Sadamatsu, an accomplished inventor based in Kanagawa, Japan, has made significant contributions to the field of electrophotography. With a remarkable portfolio of 11 patents, he continues to push the boundaries of innovation in imaging technology, working at Fuji Xerox Co., Ltd.

Latest Patents

Among his latest patents are two notable inventions. The first is a "Developer composition for electrophotography comprising fine particles." This invention introduces a unique developer for electrostatic latent images, consisting of a carrier powder, toner powder, and a fine powder made of a polymer that resides closer to the carrier side of the triboelectric series. Notably, this developer minimizes issues such as insufficient cleaning and toner filming on photoreceptors or electrostatic recording elements.

The second patent focuses on a "Developer and toner composition produced by emulsion polymerization." This invention details a developer that includes a toner powder and a fine powder, created through soap-free emulsion polymerization, showcasing innovative chemical processes that enhance image quality in electrophotographic applications.

Career Highlights

Throughout his career, Shigeru Sadamatsu has demonstrated a commitment to advancing imaging technology. His work at Fuji Xerox Co., Ltd. has positioned him as a leader in the development of cutting-edge solutions for electrophotography, significantly impacting the industry.

Collaborations

Sadamatsu collaborates with talented colleagues, including Takayoshi Aoki and Yukihiro Ishii, contributing to the sharing of knowledge and expertise within their innovative projects. These collaborative efforts are essential in driving forward the technological advancements that characterize their work environment at Fuji Xerox Co., Ltd.

Conclusion

Shigeru Sadamatsu’s inventive contributions to the field of electrophotography not only highlight his ingenuity but also the collaborative spirit of the team at Fuji Xerox Co., Ltd. With ongoing projects and developments, Sadamatsu remains a prominent figure in advancing imaging technologies, setting new standards through his patents and inventions.

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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