Kengo Hattori

3 Patents

• US124071482025

  Spark Plug

  NITERRA CO, Ltd.

  0 cites
• US123086192025

  Noble Metal Tip for Spark Plug, Electrode for Spark Plug, and Spark Plug

  NGK SPARK PLUG CO., Ltd.

  0 cites
• US116163462023

  Spark Plug

  NGK SPARK PLUG CO., Ltd.

  0 cites