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Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; apparatus for recording, transmission or reproduction of sound or images; magnetic data carriers, recording discs; automatic vending machines and mechanisms for coin-operated apparatus; cash registers, calculating machines, data processing equipment and computers; fire-extinguishing apparatus.
piezoelectric ceramic components, namely, discs, hollow cylinders, solid cylinders, hemispheres and rectangular bars for use in the manufacture of transducers, hydrophones, sonar equipment, and ultrasonic equipment; piezoelectric ceramic materials and products, namely, piezoelectric ceramic wafers, discs, tubes, and composites for use in the manufacture of medical ultrasound imaging transducers, ink jet heads, hydrophones; ultrasonic and acoustic transducers; depth sounders; hydrophones; sonar; marine and underwater surveillance and navigation equipment, namely, long-baseline, short-baseline, supershort-baseline and ultrashort-baseline transducers and signal conditioning and processing electronic circuit boards and software, and harbor protection and diver detection transducers and signal conditioning and processing electronic circuit boards and software; marine transceivers and transponders; precision homing and docking equipment, namely, transducers and signal conditioning and processing electronic circuit boards and software that enable unmanned underwater vehicles to rendezvous with launch and recovery platforms; flexible array systems comprised primarily of transducers, signal conditioning and processing electronic circuit boards and software and mechanical packaging for dynamic, towed applications or static, fixed applications; acoustic communication links; range systems comprised primarily of transponders, transducers, signal conditioning and processing electronic circuit boards and software and mechanical packaging components