collection of electrical protection devices; namely, a surge protector, lighting arrestor and spark gap, all incorporating ionic charge or current transfer using either gas or a liquid transfer medium for use in the corrosion industries; namely, oil and gas, petroleum, transportation, electrical power and utility industries to protect metal piping from the damaging effects of corrosion

CATHODIC HYDROCOATING INSTALLATIONS FOR ELECTRICALLY DEPOSITING A COATING ON MATERIALS FROM A PAINT BATH