In a welder wand including a welding tip attached to handle with an elongate, rigid conduit, the handle having a trigger for activating the welding tip, improvements therein including an optical light system attached to the welder wand comprising a light source mounted proximate to the welding tip and...http://www.google.fr/patents/US7186950?utm_source=gb-gplus-shareBrevet US7186950 - Welder with light source
