Spark plug for use in an internal combustion engine

Spark plug for use in an internal combustion engine

Spark plug for use in an internal-combustion engine with a...

Spark plug for use in internal combustion engine

Spark plug for use in internal combustion engine

Spark plug for use in internal combustion engine

Spark plug having a built-in resistor for suppressing noise sign

Spark plug having a bypass electrode extending along a...

Spark plug having a creepage spark gap

Spark plug having a flame deflector for use in an internal combu

Spark plug having a metal layer in a terminal metal piece

Spark plug having a metallic shell with defined relationship...

Spark plug having a metallic terminal within a through-hole

Spark plug having a multi-layered electrode

Spark plug having a multi-tiered center wire assembly

Spark plug having a noble metal electrode portion

Spark plug having a noble metal electrode tip

Spark plug having a noble metal firing tip bonded to a front end

Spark plug having a noble metallic firing tip bonded to an...

Spark plug having a noble-metal chip and method for...