75236659
Feb 5, 1997
Sep 25, 2001
ultrasonic probes, ultrasonic analyzers and computers excluding acoustic microscopes and ultrasonic imaging systems all used for gathering an analyzing ultrasonic signals emanating from industrial equipment, such as steam traps, valves, bearings, compressors and combustion engines in heavy industry and for monitoring such industrial equipment and not used for imaging of objects or for producing ultrasonic images or for medical purposes
Electrical and Scientific Apparatus