Company Filing History:

7 out of 16,458

Fuji Photo Film Company, Limited

Years Active: 1976-1984

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13 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 4481253 - Process for preparing ferromagnetic metal powder and a magnetic (1984-11-06),

2. 4465737 - Magnetic recording medium (1984-08-14),

3. 4455345 - Magnetic recording medium (1984-06-19),

4. 4105448 - Electrophotographic photosensitive layer and marking method (1978-08-08),

5. 4072522 - Method of treating photoconductive zinc oxide (1978-02-07),

6. 4062789 - Liquid developer for electrophotography (1977-12-13),

7. 4025338 - Method for machining metal work (1977-05-24),

8. 3986968 - Milled and polar solvent extracted liquid developer (1976-10-19),

9. 3982938 - Photoconductive toners which include photoconductive pigment particles (1976-09-28),

10. 3969113 - Photosensitive binder layer for xerography containing titanium oxide and (1976-07-13),

11. 3968044 - Milled liquid developer (1976-07-06),

12. 3963486 - Electrophotographic imaging process employing epoxy-ester containing (1976-06-15),

13. 3941594 - Electrophotographic element with ZnO and TiO.sub.2 (1976-03-02),

Title: The Innovative Contributions of Hajime Miyatuka

Introduction

Hajime Miyatuka is a prominent inventor based in Asaka, Japan. He has made significant contributions to the field of magnetic materials, holding a total of 13 patents. His work has advanced the technology behind magnetic recording mediums, showcasing his expertise and innovative spirit.

Latest Patents

Miyatuka's latest patents include a process for preparing ferromagnetic metal powder and a magnetic recording medium utilizing that powder. The process involves heat-treating acicular iron oxyhydroxide or acicular iron oxide powder in a non-reducing gas at temperatures ranging from 300°C to 1000°C, or in a reducing gas at temperatures from 150°C to 500°C. This method effectively removes water-soluble impurities, resulting in a ferromagnetic metal powder with excellent oxidation stability and corrosion resistance. The magnetic recording medium he developed features a support with a magnetic layer composed of ferromagnetic metal powder and a binder, enhancing video characteristics and reducing modulation noise.

Career Highlights

Throughout his career, Miyatuka has worked with notable companies such as Fuji Photo Film Company, Limited and Rank Xerox Ltd. His experience in these organizations has contributed to his understanding and development of advanced magnetic materials.

Collaborations

Miyatuka has collaborated with esteemed colleagues, including Satoru Honjo and Akira Kasuga.

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