Welding apparatus

Welding at pressures greater than atmospheric pressure

Welding power supply

Well-site insulated heating apparatus

Wet dressing heating system

Wet dressings heater

White light illumination system with improved color output

White light luminaire with adjustable correlated colour...

White light-emitting electroluminescent device

White-light emitting device, and phosphor and method of its...

Wide dimming range gas discharge lamp drive system

Wide range power control for electric discharge lamp and...

Wind power plant and method for operating obstacle or hazard...

Window moisture preventive device with automatic temperature...

Window pane for automotive vehicles

Windshield de-icing and defrosting mitt using microwave...

Windshield wiper de-icing windshield and method of...

Windshield wipers

Wire heat treating apparatus

Wire resistance electric heating coil supported in a vacuum...