Norihisa Nakagawa

This inventor holds 75 USPTO granted patents and 1 published patent application, plus 1 CIPO patent and 36 EPO patents, primarily in Internal Combustion Engine (CPC class F02D). Top assignee: Toyota Jidosha Kabushiki Kaisha. Active years: 1985-2022.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Norihisa Nakagawa. Retrieved from https://idiyas.com/inventor/norihisa-nakagawa

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

USPTO Granted Patents = 75 (Patent Applications = 1)

% Patents Active = 58.7

CIPO Patents = 1

EPO Patents = 36 (Patent Applications = 35)

Average Co-Inventor Count = 2.2

ph-index = 11

Forward Citations = 368(Granted Patents)

Forward Citations (Not Self Cited) = 354(Dec 10, 2025)

Inventors with similar research interests:

Location History:

Numadu, JP (2007 - 2010)
Numazu, JP (1992 - 2017)
Toyota, JP (2018 - 2020)
Susono, JP (1985 - 2022)

Company Filing History:

75 out of 38,970

Toyota Jidosha Kabushiki Kaisha

patents

Years Active: 1985-2022

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Areas of Expertise:

Exhaust Purification

Control Device

Gasoline Engine

Degradation Diagnosis

Hybrid Vehicle

Exhaust Gas Control

Control System

Internal Combustion Engine

75 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 11225896 - Degradation diagnosis device for exhaust gas control catalyst (2022-01-18),

2. 11143082 - Exhaust purification system of internal combustion engine (2021-10-12),

3. 11067020 - Control device of internal combustion engine, internal combustion engine, and vehicle (2021-07-20),

4. 11047286 - Exhaust gas control apparatus for internal combustion engine (2021-06-29),

5. 10851732 - Controller for internal combustion engine and method for controlling internal combustion engine (2020-12-01),

6. 10781765 - Control system of internal combustion engine (2020-09-22),

7. 10711720 - Control system for internal combustion engine (2020-07-14),

8. 10697387 - Control system of internal combustion engine (2020-06-30),

9. 10669961 - Exhaust purification system of internal combustion engine (2020-06-02),

10. 10655547 - Internal combustion engine (2020-05-19),

11. 10641146 - Exhaust purification system of internal combustion engine (2020-05-05),

12. 10634027 - Exhaust purification system of internal combustion engine (2020-04-28),

13. 10626815 - Control system of internal combustion engine (2020-04-21),

14. 10458348 - Control apparatus for an internal combustion engine (2019-10-29),

15. 10344693 - Control apparatus for gasoline engine (2019-07-09),

Title: The Innovative Contributions of Norihisa Nakagawa

Introduction

Norihisa Nakagawa is a prominent inventor based in Susono, Japan, known for his significant contributions to exhaust gas control technology. With a remarkable portfolio of 75 patents, Nakagawa has made strides in enhancing the efficiency and functionality of internal combustion engines.

Latest Patents

Among his latest innovations are two notable patents:

1. **Degradation Diagnosis Device for Exhaust Gas Control Catalyst**: This device features a downstream air-fuel ratio sensor and a control device that performs rich and lean processes alternately to diagnose degradation in the exhaust gas control catalyst. The control device assesses catalyst degradation based on the frequency of lean air-fuel ratio outputs from the sensor.

2. **Exhaust Purification System of Internal Combustion Engine**: This advanced exhaust purification system includes a catalyst with catalytic functionality, a particulate filter positioned downstream, and an oxygen feed device. The system detects ammonia concentration in exhaust gas and adjusts oxygen feed based on specific conditions, optimizing catalyst performance and particulate matter management.

Career Highlights

Nakagawa has spent a significant part of his career at Toyota Motor Corporation, contributing his expertise to various projects within the company. His work at such a prestigious organization underscores his influence and importance in the field of automotive engineering.

Collaborations

Throughout his career, Nakagawa has collaborated with talented professionals such as Shuntaro Okazaki and Yuji Yamaguchi, further enhancing the innovative environment surrounding his work. Their combined expertise plays a crucial role in advancing new technologies in the automotive sector.

Conclusion

Norihisa Nakagawa's dedication to innovation in exhaust gas control systems showcases his impact on the automotive industry. With numerous patents to his name and esteemed collaborations, his contributions continue to shape the future of sustainable engine technologies.

Profile summary based on public USPTO records.