Spark plug with tapered fired-in suppressor seal

Spark plug, alumina insulator for spark plug, and method of...

Spark plug, insulator for spark plug and process for...

Spark plug, particularly for internal combustion engines having

Spark plugs for internal-combustion engines

Sparking plug

Sparking plug equipped with a pressure sensor, and...

Sparking plug with efficient air supplying system and a removabl

Sparking-plug

Sparkplug for an internal combustion engine

Sparkplug for internal combustion engine

Sparkplug with antifouling coating on discharge end of insulator

Sparkplug with improved antifouling performance

Sparkplug with precision gap

Starting element having ceramic component electrostatically...

Structure of spark plug achieving high degree of air-tightness

Structure of spark plug designed to provide high thermal...

Structure of spark plug designed to provide higher wear...

Structure of spark plug designed to provide higher...

Structure of spark plug designed to provide higher...