Method for securing a metal noble tip to an electrode of a...

Method for treating spark plugs

Method of forming a tubular electrical insulator assembly

Method of inserting a center electrode in a spark plug insulator

Method of making a ground electrode for a spark plug

Method of making a spark plug

Method of making a spark plug

Method of making a spark plug for an internal combustion engine

Method of making a spark plug having a multi-tiered center...

Method of making a spark-plug center electrode

Method of making an igniter plug with nickel coating on center e

Method of making copper-clad bimetal electrodes for spark plugs

Method of making metallic shell for spark plug, method of...

Method of making spark ignition electrode assembly

Method of manufacturing a center electrode for a spark plug

Method of manufacturing a spark plug for an internal...

Method of manufacturing a spark plug for an internal...

Method of manufacturing a spark plug with ground electrode conce

Method of manufacturing electrode for plug

Method of manufacturing nickel core copper center electrodes