Underwater sound wave direction finding system
Underwater surveying system
Underwater switching
Underwater target detection apparatus
Underwater transducer and projector therefor
Underwater transient sound generator having pressure compensatin
Underwater transponder calibration arrangement
Underwater viewing system
Uneven token distribution technique for token based local area n
Uni-directional magnetic tag
Uni-directional protocol
Unidirectional horizontal seismometer
Unidirectional telemetry system
Unified control device for bicycle accessory
Unified paging
Uniform coloration control in an electrochromic display of the s
Uniform coloration control in an electrochromic display of the s
Uniformly lighted airfield guidance sign
Uninsured and/or stolen vehicle tracking system
Unipolar wide-range current-to-frequency converter