Landing aid for aircraft
Lateral direction detection sonar
Least mean square (LMS) normalizer for active sonar
Light pipe display for sonar
Linear frequency modulation apparatus and technique
Liquid level sensor
Liquid presence detector having a composite waveguide for acoust
Load detecting system for automatic storage apparatus
Loading dock range finding system
Localization of high speed vehicles using continuous...
Location recognition system using stereophonic sound,...
Low cost shading for wide sonar beams
Low frequency portable lightweight sonar systems and their metho
Low frequency sonar systems
Low transient switching system
Low-frequency directional sonar systems