logo

For the Inventor, By the Inventor

Nagoya, Japan

Ngk Spark Plug Company, Limited

USPTO Granted Patents = 2,606

% Expired Patents = 24.3



Trademarks = 37

Forward Citations = 17,452

Loading Chart...
Loading Chart...

1,601 inventors (with patents filed for the assignee):

goldMedal Akira Suzuki (63 out of 106 patents)

silverMedal Tomoaki Kato (62 out of 62 patents)

bronzeMedal Wataru Matsutani (60 out of 60 patents)

4.  Takafumi Oshima (60 out of 60 patents)

5.  Yoshihiro Matsubara (57 out of 57 patents)

6.  Toshitaka Honda (55 out of 55 patents)

7.  Hiroshi Inagaki (51 out of 62 patents)

8.  Noboru Ishida (46 out of 47 patents)

9.  Yuichi Yamada (44 out of 48 patents)

10.  Hiroyuki Kameda (43 out of 43 patents)

11.  Hirokazu Kurono (41 out of 41 patents)

12.  Kazuo Kondo (41 out of 44 patents)

13.  Takao Kojima (41 out of 42 patents)

14.  Shigeru Miyata (40 out of 40 patents)

15.  Katsutoshi Nakayama (39 out of 39 patents)


Core Competencies:
Spark Plug
Gas Sensor
Ceramic Materials
Internal Combustion Engine
Electrode Design
Temperature Control
Wavelength Conversion
Cutting Tools
Sensor Manufacturing
Aluminum Nitride
Noble Metal Tip
Hydrogel

2,606 patents:

1. 12308619 - Noble metal tip for spark plug, electrode for spark plug, and spark plug (2025-05-20),
2. 12009639 - Spark plug (2024-06-11),
3. 12003078 - Spark plug (2024-06-04),
4. 11862943 - Spark plug (2024-01-02),
5. 11851344 - Complex oxide ceramic, method for producing same, and article (2023-12-26),
6. 11824325 - Light-emitting apparatus and light-emitting element housing (2023-11-21),
7. 11768168 - Sensor and method for manufacturing same (2023-09-26),
8. 11761924 - Sensor element, gas sensor, and gas sensor unit (2023-09-19),
9. 11754259 - Fluorescent plate, wavelength conversion member, and light source device (2023-09-12),
10. 11749971 - Metallic shell for spark plug and spark plug using the same (2023-09-05),
11. 11724415 - Method for producing ceramic sintered body, and method and device for producing ceramic molded body (2023-08-15),
12. 11715933 - Spark plug (2023-08-01),
13. 11695258 - Spark plug (2023-07-04),
14. 11695257 - Spark plug (2023-07-04),
15. 11692699 - Wavelength conversion member, light source device, and method for manufacturing wavelength conversion member (2023-07-04),
Company Overview
Ngk Spark Plug Company, Limited, headquartered in Nagoya, Japan, specializes in the development and manufacturing of spark plugs and related technologies. The company is a leader in spark plug technology, focusing on innovations in electrode design, temperature control, and ceramic materials. Additionally, Ngk is involved in gas sensor technology and cutting tools, contributing to advancements in internal combustion engines and enhancing overall engine performance. Their commitment to research and development positions them at the forefront of automotive engineering solutions.
Profile summary synthesized from public USPTO records and patent filings.

logo

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

Ngk Spark Plug Company, Limited USPTO Patent Assignee Logo
2,606 Patents

#3 in Nagoya

#94 in Japan

#367 in the World

Nagoya, JP
Nagoya, Japan

Ngk Spark Plug Company, Limited

Forward Citations = 17,452

1,601 inventors:

goldMedal Akira Suzuki (63 out of 106 patents)

silverMedal Tomoaki Kato (62 out of 62 patents)

bronzeMedal Wataru Matsutani (60 out of 60 patents)

4.  Takafumi Oshima (60 out of 60 patents)

5.  Yoshihiro Matsubara (57 out of 57 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Ngk Spark Plug Company, Limited. Retrieved from https://idiyas.com/company/ngk-spark-plug-company

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

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]
Loading…