Spark plug with lower operating temperature

Spark plug with multiple ground electrodes

Spark plug with perpendicular knife edge electrodes

Spark plug with pressure sensor

Spark plug with replaceable ground electrode

Spark plug with simultaneously multi-firing cap

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 plugs for internal-combustion engines

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

Sparking-plug

Sparkplug for an internal combustion engine

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