Spark plug with specific construction to avoid unwanted surface

Spark plug with specific electrode material

Spark plug with specific electrode structure

Spark plug with specific gap between insulator and electrodes

Spark plug with specific measured parameters

Spark plug with specific metal shell coating

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