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For the Inventor, By the Inventor

Tokorozawa, Japan

Yutaka Sugita

This inventor holds 62 USPTO granted patents, primarily in Magnetic Recording Technology (CPC class 365 ). Top assignees: Hitachi, Ltd., Hitachi Cable, Inc., Hitachi Maxell, Limited. Active years: 1976-1997.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yutaka Sugita. Retrieved from https://idiyas.com/inventor/yutaka-sugita

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

USPTO Granted Patents = 62

% Patents Active = 100.0

Average Co-Inventor Count = 5.3

ph-index = 11

Forward Citations = 404(Granted Patents)

Forward Citations (Not Self Cited) = 391(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Tokorozawa, JA (1976)
  • Mobara, JP (1985)
  • Tokyo, JP (1986)
  • Hitachi, JP (1991)
  • Tokorozawa, JP (1979 - 1997)

Company Filing History:

goldMedal62 out of 42,740 
 
Hitachi, Ltd.
 patents
silverMedal1 out of 836 
 
Hitachi Cable, Inc.
 patents
bronzeMedal1 out of 1,112 
 
Hitachi Maxell, Limited
 patents
4. 1 out of 149 
 
Hitachi Microcomputer Engineering, Ltd.
 patents
5. 1 out of 522 
 
Nippon Telegraph and Telephone Public Corporation
 patents
where one patent can have more than one assignee

Years Active: 1976-1997

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Areas of Expertise:
Magnetic Recording
Optical Disk
Magnetic Head
Thin Film
Magnetic Bubble Memory
Magneto-Optical
Data Storage
Information Processing
Magnetic Layer
Magnetic Field Measurement
Disk Memory
High Density
62 patents (USPTO):Explore Patents
1. 5671107 - Large capacity magnetic disc apparatus with a particular relationship (1997-09-23),
2. 5639547 - Magnetic heads and magnetic recording reproducing devices using magnetic (1997-06-17),
3. 5583840 - ROM type optical recording medium with a high reflectivity and an (1996-12-10),
4. 5541789 - Magnetic recording apparatus with magnetic head on slider having applied (1996-07-30),
5. 5475656 - Optical disk memory and information processing apparatus (1995-12-12),
6. 5371730 - Optical memory and information processing apparatus (1994-12-06),
7. 5350886 - Mounting substrate (1994-09-27),
8. 5317556 - Information processing apparatus and optical head incorporated therein (1994-05-31),
9. 5316617 - Thin film magnetic head and method of manufacturing the same (1994-05-31),
10. 5307214 - Magnetic recording apparatus (1994-04-26),
11. 5296979 - Magnetic disc apparatus with thin film head suitable for high-density (1994-03-22),
12. 5274612 - Information processor and disk memory used in the same (1993-12-28),
13. 5245493 - Magnetic information storage apparatus including magnetic head and (1993-09-14),
14. 5109311 - Magnetic disk device and method of recording/retrieving information (1992-04-28),
15. 5051856 - Thin film magnetic head with mixed crystal structures (1991-09-24),

Title: Innovations and Contributions of Yutaka Sugita in Magnetic Disc Technology

Introduction

Yutaka Sugita, a prolific inventor based in Tokorozawa, Japan, has made significant strides in the field of magnetic disc technology, holding an impressive total of 62 patents. His contributions have played a crucial role in enhancing recording densities and improving the efficiency of magnetic recording devices.

Latest Patents

Among his latest innovations is the patent for a large capacity magnetic disc apparatus, which boasts a recording density of 120 megabits per square inch or more. This invention defines a relationship among the pole thickness of thin-film magnetic heads, the saturation flux density of cores, and the recording wavelength for thin film magnetic discs, particularly when dealing with coercivity values of 1800 Oe or higher. Additionally, Sugita developed a technology involving magnetic heads and magnetic recording reproducing devices that feature a magnetic lamination with multiple films, each comprising magnetically soft materials. Notably, this design allows for differentiating thicknesses in intervening films, which may include transition metals for improved performance.

Career Highlights

Yutaka Sugita's professional journey has seen him work with esteemed organizations such as Hitachi, Ltd. and Hitachi Cable, Inc. His work in these companies has led to the development of innovative solutions that have transformed the industry. Sugita's relentless quest for improvement in magnetic disc technology has earned him recognition among peers and the broader engineering community.

Collaborations

Throughout his career, Sugita has collaborated with renowned professionals, including Ryo Suzuki and Teruaki Takeuchi. These partnerships have allowed for a rich exchange of ideas and expertise, resulting in advancements that push the boundaries of current technology.

Conclusion

Yutaka Sugita's innovative contributions to magnetic disc technology, exemplified by his substantial patent portfolio, underline his status as a key inventor in the field. His latest patents, career achievements, and collaborative efforts continue to inspire advancements in data recording and storage mechanisms, ensuring that his legacy endures in the technological landscape.

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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