Underwater acoustic telemetry equipment, namely, ultrasonic transmitters for tracking and studying the behavior of fish and other aquatic animals; underwater acoustic ultrasonic transmitters; underwater acoustic ultrasonic receivers; waterproof electronic data-loggers for recording and storing water temperature and water depth data; waterproof wireless data-loggers for recording and storing water temperature and water depth data; hydrophones

Electrical cables and connectors therefor for use in the data transmission field

entry door systems consisting of metal doors, hardware and thresholds

Drafting Machines and Drawing Instruments Comprising Compasses, Dividers, Bow Compasses, Drawing Pens, Protractors, Rulers and Scales