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For the Inventor, By the Inventor

Tokyo, Japan

Hiroyuki Tomita

This inventor holds 73 USPTO granted patents and 7 published patent applications and 9 EPO patents, primarily in Magnetic Recording Technology (CPC class G02B). Top assignees: Nikon Corporation, Hitachi, Ltd., Showa Denko K.k.. Active years: 1985-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiroyuki Tomita. Retrieved from https://idiyas.com/inventor/hiroyuki-tomita

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

USPTO Granted Patents = 73 

% Patents Active = 86.3

 

Average Co-Inventor Count = 2.5

ph-index = 11

Forward Citations = 345(Granted Patents)

Forward Citations (Not Self Cited) = 316(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Kawasaki, JP (1998 - 2001)
  • Hitachi, JP (2002 - 2003)
  • Kanagawa-ken, JP (1996 - 2009)
  • Funabashi, JP (1985 - 2011)
  • Saitama, JP (2013 - 2017)
  • Yokohama, JP (2004 - 2022)
  • Ichihara, JP (2021 - 2023)
  • Tokyo, JP (1994 - 2024)

Company Filing History:

goldMedal25 out of 8,995 
 
Nikon Corporation
 patents
silverMedal18 out of 42,731 
 
Hitachi, Ltd.
 patents
bronzeMedal13 out of 1,961 
 
Showa Denko K.k.
 patents
4. 5 out of 64 
 
Leader Electronics Corporation
 patents
5. 4 out of 498 
 
Hitachi Industrial Equipment Systems Co., Ltd.
 patents
6. 4 out of 530 
 
Konami Digital Entertainment Co., Ltd.
 patents
7. 2 out of 34 
 
Hitachi Keiyo Engineering Co., Ltd.
 patents
8. 1 out of 39,374 
 
Fujitsu Corporation
 patents
9. 1 out of 26 
 
Fujitsu Isotec Limited
 patents
10. 1 out of 401 
 
Resonac Corporation
 patents
11. 2 out of 834,513 
Other
 patents
where one patent can have more than one assignee

Years Active: 1985-2026

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Areas of Expertise:
Magnetic Sensor
Fluorine-Containing Ether
Magnetic Recording Medium
Focus Adjustment
Imaging Apparatus
Camera System
Game Management Device
Induction Motor Drive
Vibration Reduction
Data Integrated Analysis
Lens Barrel
Speed Calculation Device
73 patents (USPTO):Explore Patents
1. 12535541 - Magnetic sensor (2026-01-27),
2. 12050363 - Interchangeable lens, camera body, and camera (2024-07-30),
3. 11870384 - Speed calculation device and power conversion device (2024-01-09),
4. 11719768 - Magnetic sensor and magnetic sensor device (2023-08-08),
5. 11719767 - Magnetic sensor (2023-08-08),
6. 11661478 - Magnetic recording medium, fluorine-containing ether compound and lubricant for magnetic recording medium (2023-05-30),
7. 11639330 - Fluorine-containing ether compound, lubricant for magnetic recording medium, and magnetic recording medium (2023-05-02),
8. 11555005 - Fluorine-containing ether compound, lubricant for magnetic recording medium, and magnetic recording medium (2023-01-17),
9. 11514945 - Lubricant for magnetic recording medium, and method for producing magnetic recording medium (2022-11-29),
10. 11474325 - Focus adjustment apparatus, imaging apparatus and lens barrel (2022-10-18),
11. 11427779 - Fluorine-containing ether compound, lubricant for magnetic recording medium, and magnetic recording medium (2022-08-30),
12. 11418698 - Focus adjustment device and imaging apparatus (2022-08-16),
13. 11375099 - Camera body for receiving first and second image plane transfer coefficients (2022-06-28),
14. 11292979 - Fluorine-containing ether compound, lubricant for magnetic recording medium and magnetic recording medium (2022-04-05),
15. 11279664 - Fluorine-containing ether compound, lubricant for magnetic recording medium, and magnetic recording medium (2022-03-22),

Title: Innovations and Contributions of Hiroyuki Tomita

Introduction

Hiroyuki Tomita, a prominent inventor based in Tokyo, Japan, has made significant contributions to the field of photography and power conversion. With a remarkable portfolio of 72 patents, Tomita's innovations reflect his expertise and dedication to advancing technology in camera systems and motor control devices.

Latest Patents

Among his latest patents are groundbreaking technologies that include an interchangeable lens designed for camera bodies. This innovation features a focusing optical system that allows users to vary the focal position while transmitting critical data regarding movement relationships between the optical system and the image plane. In addition, he has developed a speed calculation device and a power conversion device that enhances motor control mechanisms. This invention simplifies speed detection with a high time axis resolution while integrating a control unit for efficient inverter operation.

Career Highlights

Hiroyuki Tomita has held positions in renowned companies such as Nikon Corporation and Hitachi, Ltd. His work with these industry leaders has been pivotal in developing state-of-the-art imaging and power technologies, shaping the future of both fields.

Collaborations

Throughout his career, Tomita has collaborated with notable professionals in the industry, including Naoya Fukumoto and Katsumi Murofushi. These partnerships have fostered an environment of innovation and have led to the successful realization of several advanced technological solutions.

Conclusion

Hiroyuki Tomita's impressive collection of patents and his work with leading technology firms illustrate his passion for innovation. His contributions not only enhance camera technology but also improve power management systems, highlighting the vital role of inventors in driving technological advancements.

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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