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For the Inventor, By the Inventor

Kawasaki, Japan

Yoshihiro Tonomoto

This inventor holds 23 USPTO granted patents, primarily in Electrophotographic Imaging. Top assignee: Fujitsu Corporation. Active years: 1990-2001.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoshihiro Tonomoto. Retrieved from https://idiyas.com/inventor/yoshihiro-tonomoto

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 = 2.6

ph-index = 10

Forward Citations = 250(Granted Patents)


Location History:

  • Yokohama, JP (1991 - 1992)
  • Kawasaki, JP (1990 - 2001)
  • Kanagawa, JP (1991 - 2001)

Company Filing History:

goldMedal23 out of 39,374 
 
Fujitsu Corporation
 patents

Years Active: 1990-2001

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Areas of Expertise:
Electrophotographic Apparatus
Image Forming
Toner Recovery
Developing Device
Photo-Sensitive Drum
Thermal Fixation
Color Imaging
Toner Detection
Cleaning Unit
Print Density
23 patents (USPTO):Explore Patents
1. 6308020 - Printer and transfer charger (2001-10-23),
2. 6212340 - Image forming apparatus utilizing a two-component developing apparatus with automatic toner replenishment and developer replacement (2001-04-03),
3. 6055401 - Electrophotographic image-forming apparatus having developing device (2000-04-25),
4. 5987280 - Developing device for electrostatic latent image (1999-11-16),
5. 5933690 - Toner recovery device (1999-08-03),
6. 5905930 - Image forming apparatus (1999-05-18),
7. 5887236 - Image forming apparatus (1999-03-23),
8. 5826134 - Electrophotographing apparatus having a toner empty discriminating unit (1998-10-20),
9. 5754919 - Electrostatic recording apparatus utilizing superimposition of colors in (1998-05-19),
10. 5740501 - Photo-sensitive drum formed from extruded or drawn blank and image (1998-04-14),
11. 5640662 - Hot roller for thermal fixation device having elastomeric and (1997-06-17),
12. 5617192 - Multicolor electrostatic recording apparatus and electrostatic latent (1997-04-01),
13. 5546170 - Printer with print density switching means (1996-08-13),
14. 5508797 - Color image forming apparatus having toner image forming device (1996-04-16),
15. 5355200 - Printer with print density switching means (1994-10-11),

Title: Innovations and Contributions of Yoshihiro Tonomoto

Introduction: Yoshihiro Tonomoto is a prominent inventor based in Kawasaki, Japan, with an impressive portfolio of 23 patents. His work has significantly impacted the field of imaging technologies, particularly in printers and developing apparatuses. As an integral part of Fujitsu Corporation, Tonomoto has played a crucial role in advancing printing solutions that cater to modern technological demands.

Latest Patents: Among his latest innovations, Tonomoto has developed a revolutionary printer featuring a photosensitive drum where toner images are created. This printer includes a plurality of transfer wires aligned with the drum and a static-eliminating wire positioned downstream from the transfer wires. A unique aspect of this patent is its ability to conduct transfer currents based on the thickness of the recording paper used. Another notable invention is the image forming apparatus that utilizes a two-component developing apparatus. This design includes an automatic toner replenishment system and developer replacement mechanism, enhancing efficiency in developing latent images on a carrying body.

Career Highlights: Tonomoto's career at Fujitsu Corporation reflects a dedication to innovation and excellence in the realm of printing technology. His contributions have extended beyond patent numbers, marking him as a key player in technological advancements in the sector. The successful implementation of his ideas has propelled Fujitsu into a competitive position in the imaging market.

Collaborations: Throughout his career, Tonomoto has collaborated with esteemed colleagues, including Keiko Tonai and Katsumi Sugimoto. Together, they have synergized their efforts to push the boundaries of what is possible in imaging technology, resulting in numerous advancements and solutions that have significantly benefited the industry.

Conclusion: Yoshihiro Tonomoto continues to be a pioneering force in the development of innovative printing technologies. His contributions at Fujitsu Corporation have not only resulted in a substantial number of patents but also established him as a respected inventor in the field. As technology continues to evolve, Tonomoto's work will undoubtedly pave the way for future advancements in imaging solutions.

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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