% Expired Patents = 42.9

CIPO Patents = 11

Forward Citations = 47

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16 inventors (with patents filed for the assignee):

Tatsuya Gozawa (1 out of 28 patents)

Jiro Kyuno (1 out of 21 patents)

Naomichi Miyashita (1 out of 15 patents)

4. Mamoru Musasa (1 out of 40 patents)

5. Tomoyuki Tanaka (1 out of 2 patents)

6. Kouji Okazaki (1 out of 3 patents)

7. Yasuhiro Sugimoto (1 out of 7 patents)

8. Kazuhiro Suzuki (1 out of 3 patents)

9. Rokuro Kambe (1 out of 8 patents)

10. Kenichi Nishikawa (1 out of 17 patents)

11. Makoto Sugimoto (1 out of 35 patents)

12. Yukihiro Kimura (1 out of 16 patents)

13. Tetsuya Kasiwagi (1 out of 1 patent)

14. Masato Taniguchi (1 out of 41 patents)

15. Keizo Furusaki (9 patents)

7 patents: Sort by Forward Citations

1. 12027827 - Spark plug (2024-07-02),

2. 9160148 - Method of manufacturing spark plug (2015-10-13),

3. 8664844 - Spark plug having a substantially columnar electrode tip welded to a component thereof (2014-03-04),

4. 8641468 - Manufacturing method for spark plug (2014-02-04),

5. 6979890 - Intermediate substrate (2005-12-27),

6. 6822378 - Glaze layer for a spark plug (2004-11-23),

7. 5067369 - Ceramic camshaft (1991-11-26),

NGK Spark Plug Co., Ltd. is a leading manufacturer of spark plugs and related products for automotive, motorcycle, marine, and small engine applications. The company also produces a range of sensor products and ceramics. NGK operates globally and is known for its innovative technology and high-quality products.

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

Company Badge

USPTO Data Jan 1 1976 - Sep 22 2026

7 Patents

#91 in Nagoya

#5,458 in Japan

Nagoya, Japan

Ngk Spark Plug., Ltd.