Low power phototransistor-based welding helmet providing reduced sensitivity to low intensity light and sharp phototransistor response to high intensity light
US7026593B2
Eye-protection device having dual high voltage switching
US7171698B2
Earmuff having anatomically correct ear cups
US6970571B2
Low cost hearing protection device
US7073208B2
Ventilated safety goggles
US6841772B1
Eye-protection device having dual high voltage switching
US6881939B1
Microprocessor based automatically dimmable eye protection device
US6341382B1
One-piece adjustable headgear support
US6815652B1
Low power phototransistor-based welding helmet providing reduced sensitivity to low intensity light and sharp phototransistor response to high intensity light
WO0062119A1
Welding helmet with hybrid lens system and low power consumption control circuit therefor
US6227454B1
Device and method for applying night-visible road markings
US6107367A
Traffic stripe composition
US6260197B1
Welding helmet with conical pivoting mechanism for head gear strap
US6070264A
Welding helmet having auto-darkening and manually adjustable lens shade control
US6151711A
Welding helmet with removable face plate and lens cartridge
AU9042898A
Apparatus and method for protecting eyes from ultraviolet and bright visible light
US5533206A
Welding helmet with removable electronic quick change cartridge
US5532767A
Pantoscopic and length adjustable safety spectacle