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For the Inventor, By the Inventor

Asaka, Japan

Hajime Miyatuka

This inventor holds 13 USPTO granted patents. Top assignees: Fuji Photo Film Company, Limited, Rank Xerox Ltd., Xerox Corporation. Active years: 1976-1984.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hajime Miyatuka. Retrieved from https://idiyas.com/inventor/hajime-miyatuka

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

USPTO Granted Patents = 13

% Patents Active = 100.0

Average Co-Inventor Count = 2.1

ph-index = 7

Forward Citations = 114(Granted Patents)


Location History:

  • Tokyo, JA (1976)
  • Minami-ashigara, JA (1977)
  • Asaka, JA (1976 - 1978)
  • Asaka, JP (1978)
  • Kanagawa, JP (1984)

Company Filing History:

goldMedal7 out of 16,458 
 
Fuji Photo Film Company, Limited
 patents
silverMedal5 out of 117 
 
Rank Xerox Ltd.
 patents
bronzeMedal1 out of 24,259 
 
Xerox Corporation
 patents

Years Active: 1976-1984

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13 patents (USPTO):Explore 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.

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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