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For the Inventor, By the Inventor

Tokyo, Japan

Susumu Tatsumi

This inventor holds 23 USPTO granted patents, primarily in Electrophotography Technology. Top assignee: Ricoh Company, Ltd.. Active years: 1976-1986.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Susumu Tatsumi. Retrieved from https://idiyas.com/inventor/susumu-tatsumi

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

USPTO Granted Patents = 23

% Patents Active = 100.0

Average Co-Inventor Count = 3.3

ph-index = 15

Forward Citations = 476(Granted Patents)


Location History:

  • Kawasaki, JA (1976 - 1978)
  • Tokyo, JP (1979 - 1982)
  • Kawasaki, JP (1979 - 1983)
  • Hino, JP (1981 - 1986)

Company Filing History:

goldMedal23 out of 28,951 
 
Ricoh Company, Ltd.
 patents

Years Active: 1976-1986

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Areas of Expertise:
Electrophotography
Image Transfer
Toner Density
Electrostatographic
Copying Apparatus
Developing Unit
Exposure Control
Gas Treatment
Electrometer
Automatic Control
Photosensitive Member
Bias Developing
23 patents (USPTO):Explore Patents
1. 4614682 - Thermosensitive image transfer recording medium (1986-09-30),
2. 4423134 - Developing unit for electrophotography (1983-12-27),
3. 4415533 - Process for treating exhaust gas from electrophotographic machine and (1983-11-15),
4. 4330749 - Electrometer apparatus (1982-05-18),
5. 4318042 - Electrometer probe (1982-03-02),
6. 4306804 - Exposure control and other component control for electrostatic copying (1981-12-22),
7. 4279498 - Electrostatographic copying apparatus with automatic toner density (1981-07-21),
8. 4277549 - Copy image adjustment method (1981-07-07),
9. 4277163 - Variable magnification electrostatic copying machine (1981-07-07),
10. 4266870 - Electrostatographic apparatus comprising developing bias means (1981-05-12),
11. 4239374 - Electrostatographic apparatus comprising automatic document type (1980-12-16),
12. 4226525 - Electrostatic copying machine (1980-10-07),
13. 4215930 - Method of maintaining the correct conditions of an (1980-08-05),
14. 4213693 - Electrostatographic apparatus comprising improved developing bias control (1980-07-22),
15. 4210864 - Apparatus for sensing toner density using a stationary ferromagnetic (1980-07-01),

Title: Innovations by Susumu Tatsumi in Electrophotography and Imaging Technology

Introduction

Susumu Tatsumi, an esteemed inventor based in Tokyo, Japan, has made significant contributions to the field of imaging technology. With a remarkable portfolio of 23 patents, his work primarily focuses on thermosensitive image transfer mediums and advancements in electrophotographic processes.

Latest Patents

Among his latest innovations is the "Thermosensitive image transfer recording medium." This invention features a support material accompanied by a thermofusible ink layer that comprises a unique combination of a dye component, a binder agent, and a needle-like crystal form pigment. This inventive layer is carefully designed to enhance the quality of image transfer processes.

Additionally, Tatsumi developed a "Developing unit for electrophotography," which is crucial for electrophotographic copying apparatuses. This unit integrates a conductive member within a shield casing of the corona discharger to effectively obtain a voltage, which is applied as a bias voltage to the developing electrode. Notably, the invention allows for the superimposition of outputs from conductive members when using alternating current dischargers, thus ensuring efficient toner application and minimizing undesirable deposition.

Career Highlights

Susumu Tatsumi currently works for Ricoh Company, Ltd., a renowned leader in imaging and electronics. His expertise in developing innovative technologies has been pivotal in enhancing the capabilities and efficiency of Ricoh's product line.

Collaborations

Throughout his career, Tatsumi has collaborated with prominent colleagues such as Seiichi Miyakawa and Chikara Imai. These collaborations have resulted in groundbreaking advancements in their respective fields, further establishing Tatsumi's reputation as a leading innovator in imaging technologies.

Conclusion

With an impressive portfolio and a commitment to innovation, Susumu Tatsumi continues to shape the future of electrophotography and imaging technology. His contributions not only enhance the efficiency of existing technologies but also pave the way for new inventive solutions 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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