Spark plug

Assignee

• Ngk Spark Plug Co.

Inventors

• Yutaka Yokoyama (85 patents)
• Nobuyoshi Araki (5 patents)
• Kuniharu Tanaka (34 patents)
• Haruki Yoshida (83 patents)
• Hironori Uegaki (26 patents)
• Toshiki Kon (5 patents)
• Yusuke Nomura (6 patents)

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