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Ngk Spark Plug Company, Limited

USPTO Granted Patents = 2,606

CIPO Patents = 20

EPO Patents = 742

Trademarks = 46

Forward Citations = 17,187

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

Akira Suzuki (63 out of 106 patents)

Tomoaki Kato (62 out of 62 patents)

Takafumi Oshima (60 out of 60 patents)

4. Wataru Matsutani (59 out of 60 patents)

5. Yoshihiro Matsubara (56 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

Noble Metal Tip

Ceramic Sintered Body

Light-Emitting Apparatus

Wavelength Conversion Member

NOx Sensor

Ultrasonic Generator

Thermoelectric Element

Internal Combustion Engine Component

Surface-Coated Cutting Tool

Wiring Substrate

2,606 patents: Sort by Forward Citations

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),

NGK Spark Plug Company, Limited is a leading manufacturer of spark plugs, sensors, and ignition technology. With over 80 years of experience, NGK has earned a reputation for producing high-quality products that provide superior ignition performance and durability. The company serves various industries, including automotive, marine, power sports, and industrial equipment. NGK's commitment to innovation and technological advancement has made them a trusted brand worldwide.

This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 9 2025

2,606 Patents

#1 in Aichi

#93 in Japan

#356 in the World

Ngk Spark Plug Company, Limited

Forward Citations = 17,187

1,601 inventors:

Akira Suzuki (63 out of 106 patents)

Tomoaki Kato (62 out of 62 patents)

Takafumi Oshima (60 out of 60 patents)

4. Wataru Matsutani (59 out of 60 patents)

5. Yoshihiro Matsubara (56 out of 57 patents)

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