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For the Inventor, By the Inventor

Uchinada, Japan

Hironaga Hongawa

This inventor holds 11 USPTO granted patents. Top assignee: Pfu Limited. Active years: 1998-2006.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hironaga Hongawa. Retrieved from https://idiyas.com/inventor/hironaga-hongawa

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

Calculating rank
USPTO Granted Patents = 11

% Patents Active = 36.4

Average Co-Inventor Count = 9.9

ph-index = 6

Forward Citations = 69(Granted Patents)


Location History:

  • Kahoku-gun, JP (1998)
  • Ishikawa, JP (1998 - 2001)
  • Uchinada-machi, JP (2002 - 2006)

Company Filing History:

goldMedal11 out of 712 
 
Pfu Limited
 patents

Years Active: 1998-2006

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11 patents (USPTO):Explore Patents
1. 6996361 - Full-color electrophotographic apparatus using liquid toner containing resin (2006-02-07),
2. 6978111 - Method and device for cleaning liquid development electrophotographic device (2005-12-20),
3. 6898404 - Liquid development electrophotographic device (2005-05-24),
4. 6785501 - Transfer-and-fixation system with preheated printing medium for creating images using liquid-development electrophotographic apparatus (2004-08-31),
5. 6745002 - Liquid-development electrophotographic apparatus (2004-06-01),
6. 6625415 - Liquid-development full-color electrophotographic device (2003-09-23),
7. 6571075 - Liquid developing electrophotographic device (2003-05-27),
8. 6466756 - Electrophotographic device of liquid toner developing type (2002-10-15),
9. 6224051 - Paper feed method and apparatus (2001-05-01),
10. 5848847 - Paper feed method and apparatus for a printer (1998-12-15),
11. 5713674 - Paper feed method and apparatus for a printer (1998-02-03),

Title: Hironaga Hongawa: Innovator in Electrophotographic Technology

Introduction

Hironaga Hongawa is a prominent inventor based in Uchinada-machi, Japan. He has made significant contributions to the field of electrophotographic technology, holding a total of 11 patents. His innovative work focuses on improving the efficiency and effectiveness of printing technologies.

Latest Patents

One of Hongawa's latest patents is a full-color electrophotographic apparatus using liquid toner containing resin. This invention is designed to form a toner image on an intermediate transfer member, which is then heated to a specific temperature to facilitate the transfer of the image to a printing medium. The apparatus includes a carrier-removing roller that utilizes an electric field to remove the carrier while packing softened toner. Additionally, the printing medium is heated before contact with the toner image, enhancing the transfer process and preventing thermal damage to the photoconductor member.

Another notable patent is a method and device for cleaning liquid development electrophotographic devices. This cleaning apparatus effectively removes residual liquid developer from the intermediate transfer member after the toner image has been transferred to the printing medium. It features a cleaning-liquid application device, a bias voltage application device, and a collection device to ensure efficient cleaning without transferring an image to the printing medium.

Career Highlights

Hironaga Hongawa is currently employed at Pfu Limited, where he continues to develop innovative technologies in the field of electrophotography. His work has significantly advanced the capabilities of printing technologies, making them more efficient and reliable.

Collaborations

Hongawa has collaborated with notable coworkers, including Satoshi Sakai and Shigeharu Okano. Their combined expertise has contributed to the successful development of various technologies in their field.

Conclusion

Hironaga Hongawa is a key figure in the advancement of electrophotographic technology, with a strong portfolio of patents that reflect his innovative spirit. His contributions continue to shape the future of printing technologies, making them more efficient and effective.

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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