Nobuhiro Miyakawa

This inventor holds 44 USPTO granted patents, primarily in Electrophotography Technology. Top assignee: Mita Industrial Co., Ltd.. Active years: 1977-1990.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Nobuhiro Miyakawa. Retrieved from https://idiyas.com/inventor/nobuhiro-miyakawa

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

USPTO Granted Patents = 44

% Patents Active = 100.0

Average Co-Inventor Count = 2.4

ph-index = 10

Forward Citations = 311(Granted Patents)

Location History:

Kobe, JA (1977)
Esaka, JP (1984)
Kobe, JP (1979 - 1985)
Suita, JP (1982 - 1985)
Abiko, JP (1984 - 1986)
Ashiya, JP (1986 - 1990)

Company Filing History:

44 out of 1,344

Mita Industrial Co., Ltd.

patents

Years Active: 1977-1990

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Areas of Expertise:

Electrophotography

Magnetic Developer

Photosensitive Material

Electrostatic Imaging

Azoic Pigment

Thermosensitive Recording

Electric Recording

Conductive Composition

Color Developer

Heat-Sensitive Material

Electrosensitive Recording

Image Transfer

44 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 4963454 - Method for developing electrostatic images using magnetic brush (1990-10-16),

2. 4614698 - Two-component electrophotographic developer with magnetic carrier (1986-09-30),

3. 4607936 - Electrophotographic apparatus comprising photosensitive layer of (1986-08-26),

4. 4592643 - Copying machine having reduced image memory (1986-06-03),

5. 4576888 - Toner for electrophotography comprising azoic pigment having silica core (1986-03-18),

6. 4566908 - Azoic pigments having a silica core (1986-01-28),

7. 4557856 - Electrically conductive composition for electro-responsive recording (1985-12-10),

8. 4551403 - Photosensitive material for electrophotography (1985-11-05),

9. 4535044 - Photosensitive material for electrophotography containing photosensitive (1985-08-13),

10. 4530893 - One-component type red color magnetic developer (1985-07-23),

11. 4524118 - Electrophotographic photosensitive material with ozone inhibitor (1985-06-18),

12. 4504562 - One-component type magnetic developer comprises particles of cubic (1985-03-12),

13. 4502067 - Heat-sensitive black recording material (1985-02-26),

14. 4500897 - Heat-sensitive black recording element (1985-02-19),

15. 4495268 - Electrophotographic process using transfer-type one-component magnetic (1985-01-22),

Title: **Innovative Contributions of Nobuhiro Miyakawa**

Introduction

Nobuhiro Miyakawa, a prominent inventor residing in Abiko, Japan, has made significant contributions to the field of electrophotography. With an impressive portfolio of 44 patents, Miyakawa's inventions have played a crucial role in advancing technologies related to electrostatic imaging and developer compositions.

Latest Patents

Among his latest innovations, two patents stand out. The first one is a **Method for developing electrostatic images using magnetic brush**. In this method, he describes a unique electrophotographic developing process using a magnetic brush, which consists of a mixture of magnetic carrier and electroscopic toner. The development is optimized through specific toner concentration parameters, resulting in high-quality toner images.

The second patent is for a **Two-component electrophotographic developer with magnetic carrier**. This developer utilizes a blend of spherical sintered ferrite particles and chargeable toner particles to create a latent electrostatic image. The unique characteristics of the materials used enable the developer to produce images with high density, excellent resolution, and remarkable gradation without brush marks.

Career Highlights

Nobuhiro Miyakawa has built an impressive career at Mita Industrial Co., Ltd., where his research and innovations in electrophotographic technology have paved the way for advancements in imaging solutions. His work has significantly influenced the printing industry, enhancing the quality and efficiency of printed materials.

Collaborations

Miyakawa has collaborated with notable colleagues, including Teruaki Higashiguchi and Eiichi Inoue. Together, they have worked on several projects aimed at improving imaging technologies, demonstrating the effectiveness of teamwork in driving innovation forward.

Conclusion

In summary, Nobuhiro Miyakawa's contributions to electrophotography through his multiple patents reflect his dedication to innovation in imaging technology. His work continues to impact the industry, setting new standards for quality and performance in electrostatic imaging.

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]