Company Filing History:

17 out of 386

Toda Kogyo Corporation

where one patent can have more than one assignee

Years Active: 1992-2000

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17 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6103437 - Magnetic toner particles comprising magnetite particles containing (2000-08-15),

2. 5874019 - Magnetic particles for magnetic toner and process for producing the same (1999-02-23),

3. 5858532 - Magnetite particles, magnetic iron oxide particles, process for the (1999-01-12),

4. 5843610 - Magnetic particles for magentic toner and process for producing the same (1998-12-01),

5. 5688852 - Iron oxide particles and process for producing the same (1997-11-18),

6. 5652060 - Spherical magnetic particles for magnetic toner and process for (1997-07-29),

7. 5648170 - Coated granular magnetite particles and process for producing the same (1997-07-15),

8. 5599627 - Magnetic particles comprising magnetite core and process for producing (1997-02-04),

9. 5578375 - Granular magnetite particles and process for producing the same (1996-11-26),

10. 5512405 - Iron oxide particles and process for producing the same (1996-04-30),

11. 5470660 - Iron oxide particles and process for producing the same (1995-11-28),

12. 5389482 - Magnetic particle powder included in magnetic toners for magnetic image (1995-02-14),

13. 5336421 - Spinel-type spherical, black iron oxide particles and process for the (1994-08-09),

14. 5328793 - Magnetic particles for magnetic toner (1994-07-12),

15. 5232805 - Magnetic particles containing iron as the main component and process for (1993-08-03),

Title: Kazuo Fujioka: Innovator in Magnetic Toner Technology

Introduction

Kazuo Fujioka is a prominent inventor based in Hiroshima, Japan. He has made significant contributions to the field of magnetic toner technology, holding a total of 17 patents. His innovative work has advanced the quality and efficiency of toner particles used in various applications.

Latest Patents

Among his latest patents, Fujioka has developed magnetic toner particles comprising magnetite particles. These magnetite particles have an average diameter ranging from 0.05 to 0.50 micrometers. Each particle features a unique design with multiple mountain-shaped protrusions that enhance their performance. The number of these protrusions varies from 2 to 30 when viewed in projected plan. His inventions also include magnetic iron oxide particles for magnetic toner, which consist of at least 60% of the aforementioned magnetite particles. The toner particles created from these innovations exhibit excellent fluidity and produce high-definition visual images when developing electrostatic latent images.

Career Highlights

Fujioka has worked with notable companies such as Toda Kogyo Corporation and Unitika Ltd. His experience in these organizations has allowed him to refine his expertise in the development of magnetic toner technologies.

Collaborations

Throughout his career, Fujioka has collaborated with esteemed colleagues, including Hiromitsu Misawa and Koso Aoki. These partnerships have contributed to the advancement of his research and innovations in the field.

Conclusion

Kazuo Fujioka's contributions to magnetic toner technology have significantly impacted the industry. His innovative patents and collaborations reflect his dedication to enhancing the quality of toner particles. His work continues to influence the development of high-performance imaging solutions.

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