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For the Inventor, By the Inventor

Tokyo, Japan

Masafumi Nakada

This inventor holds 50 USPTO granted patents, primarily in Magnetoresistive Devices (CPC class 4286). Top assignees: Nec Corporation, Tdk Corporation, National Institute of Advanced Industrial Science and Technology. Active years: 1998-2014.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masafumi Nakada. Retrieved from https://idiyas.com/inventor/masafumi-nakada

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

USPTO Granted Patents = 50

% Patents Active = 68.0

Average Co-Inventor Count = 3.6

ph-index = 11

Forward Citations = 416(Granted Patents)

Forward Citations (Not Self Cited) = 399(Dec 10, 2025)


Inventors with similar research interests:


Company Filing History:

goldMedal47 out of 36,676 
 
Nec Corporation
 patents
silverMedal3 out of 8,247 
 
Tdk Corporation
 patents
bronzeMedal2 out of 1,763 
 
National Institute of Advanced Industrial Science and Technology
 patents
4. 1 out of 53,250 
 
Kabushiki Kaisha Toshiba
 patents
where one patent can have more than one assignee

Years Active: 1998-2014

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Areas of Expertise:
Magnetoresistive Sensor
Optical Device
Electromagnetic Field
Magnetic Storage System
Optical Modulator
Magneto-Resistance Effect
Magnetoresistive Head
Magnetic Tunnel Junction
Waveguide Device
Optical Integrated Device
Electric Field Sensor
Magnetoresistive Effect Film
50 patents (USPTO):Explore Patents
1. 8654331 - Electromagnetic field measurement apparatus (2014-02-18),
2. 8519323 - Electric field/magnetic field sensors and methods of fabricating the same (2013-08-27),
3. 8515225 - Optical device, method for manufacturing the same and optical integrated device using the same (2013-08-20),
4. 8358891 - Waveguide type optical device (2013-01-22),
5. 8254745 - Optical device, optical integrated device, and method of manufacturing the same (2012-08-28),
6. 8233753 - Electric field sensor, magnetic field sensor, electromagnetic field sensor and electromagnetic field measuring system using these sensors (2012-07-31),
7. 8153955 - Electric field sensor and method for fabricating the same (2012-04-10),
8. 8116600 - Optical phase modulation element and optical modulator using the same (2012-02-14),
9. 7920769 - Optical element, integrated optic device and optical information transmission system (2011-04-05),
10. 7372673 - Magnetoresistive effect transducer having longitudinal bias layer and control layer directly connected to free layer (2008-05-13),
11. 7369375 - Magneto-resistance effect element and magneto-resistance effect head (2008-05-06),
12. 7298596 - Magneto-resistance effect element, magneto-resistance effect head, magneto-resistance transducer system, and magnetic storage system (2007-11-20),
13. 7277261 - Magneto-resistance effect element, magneto-resistance effect head, magneto-resistance transducer system, and magnetic storage system (2007-10-02),
14. 7272270 - Optical modulator and method of manufacturing same (2007-09-18),
15. 7265949 - Magneto-resistance effect element, magneto-resistance effect head, magneto-resistance transducer system, and magnetic storage system (2007-09-04),

Title: **Masafumi Nakada: Innovator in Electromagnetic Field Measurement**

Introduction

Masafumi Nakada, located in Tokyo, Japan, is a prominent inventor with a remarkable portfolio of 50 patents. His contributions to the field of electromagnetic field measurement highlight his innovative approach to addressing challenges in high-density electronic environments.

Latest Patents

Among his latest patents is the "Electromagnetic Field Measurement Apparatus," which provides a solution for detecting circuit operations accurately and timely in areas crowded with electronic devices. This apparatus utilizes a laser light source, a polarized wave controller, and an optical fiber probe featuring electrooptic or magnetooptic materials. The system includes an analyzer to convert reflected laser light into intensity-modulated signals, incorporating time-multiplexed laser light of varying wavelengths.

Another notable patent is the "Electric Field/Magnetic Field Sensors and Methods of Fabricating the Same," which describes a method for directly forming a magnetooptical layer on an optical fiber's tip through aerosol deposition. This innovative fabrication technique establishes a unique relationship among the diameters of the magnetooptical layer, optical fiber core, and cladding.

Career Highlights

Masafumi Nakada has made significant career advancements by working with notable companies such as NEC Corporation and TDK Corporation. His experience in these esteemed organizations has enriched his expertise in the field of electromagnetic measurements and technologies.

Collaborations

Throughout his career, Nakada has collaborated with talented individuals, including Kazuhiko Hayashi and Keishi Ohashi. These collaborations have likely contributed to the innovative solutions and patents that define his work.

Conclusion

Masafumi Nakada's inventive spirit and dedication to advancements in electromagnetic field measurement serve as an inspiration within the technological community. His extensive patent portfolio not only reflects his innovative mindset but also showcases his commitment to improving electronic device functionality in complex environments.

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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