Underground electronics closure
Underground housing for telecommunication devices
Underground hydro line with cooling device
Underground power transmission lines
Underground transformer cabin consisting of two units, one...
Underground transmission system employing bare conductors...
Underground well electrical cable transition, seal and method
Undersea cable system
Undervoltage control apparatus for circuit interrupter
Undervoltage sensing circuit
Undervoltage trip circuit for circuit breaker
Underwater cable burial machine having improved cable laying...
Underwater cable burial machine having tripable plows
Underwater cable burial machine using a single cable for...
Unidirectional self-starting synchronous motor
Unidirectionally starting permanent magnet motor
Unified generator-compressor assembly
Unified generator-compressor assembly
Uniform current and voltage distribution device
Uninflammable dynamoelectric machine having coil windings...