Ultra low frequency acoustic generator
Ultrasonic vehicle alarm system
Unauthorized entry detection system
Underwater acoustic pressure release reflector
Underwater connector
Underwater depth sounder with variable beam transducer
Underwater direction finding system
Underwater directional guidance apparatus
Underwater sound wave direction finding system
Underwater transient sound generator having pressure compensatin
Unified paging
Universally applicable, in-motion and automatic toll paying syst
Unused fuel indicator for automotive engines employing catalytic
Updated diver navigation device
Urgency-based variable call notification
User identifying vehicle control and security device
Vapor emitting wear indicator
Variable acceleration monitoring system
Variable fluid pressure actuated vehicle tail light system
Vehicle acceleration monitoring device