[Class : 9] Voltage Surge Protectors For It Systems, Including Telecommunications Equipment And Computers; Voltage Surge Arresters Which Can Be Split For Assembly In Din Rails; Voltage Surge Protectors With Built In Check Of The Protection Circuit; Voltage Surge Arresters For Cathodic Corrosion Protection Installations; Voltage Surge Arresters For Use In Disconnect Blocks; Voltage Surge Arresters For Connecting To Coaxial Terminals; Voltage Surge Arresters For Field Devices And Voltage Surge Arresters For Use In Potentially Explosive Atmospheres; Voltage Surge Arresters For Inserting Into Isolated Ground Receptacles.[Class : 37] Electrical Installation, Installation And Assembly Of Lightning Protection Installations And Earthing Installations; Repair And Maintenance Of Lightning Defence And Earthing Systems. [Class : 42] Research And Development For Others With Regard To New Products; Providing Of Expert Opinion; Industrial Design; Services Provided By A High Voltage Testing Laboratory And A Test Laboratory For Testing Lightning Protection Equipment, Lightning Protection Components And Voltage Surge Arresters By Simulating Lightning Currents Or Lightning Impulse Currents; Material Testing; Quality Control; All The Aforesaid Services Solely Relating To Lightning Defence Equipment, Lightning Defence Components And Lightning Arrestors.