Windmill
Windmill powerplant
Window frame adapter for portable box fans
Windscreen washer pump for vehicle
Windscreen washer pump for vehicle
Winged structural joint and articles employing the joint
Winglet-enhanced fan
Wingtip windmill and method of use
Winnowing blower for combine harvester-thresher
Yawing device and wind power plant comprising a yawing device
Zero running clearance centrifugal compressor