75663025
Mar 18, 1999
Nov 14, 2000
Protective apparatus in the nature of explosion prevention and mitigation, namely, explosion isolation valves, diverters and barriers, explosion resistant structures, explosion relief vents, explosion detectors, explosion suppressors, explosion extinguishers, spark detectors, spark extinguishers, temperature monitors, and gas monitors, all for use in installations with danger of explosion
Electrical and Scientific Apparatus