74071894
Jun 22, 1990
Jun 30, 1992
[ apparatus for breathing protection; namely, compressed air respirators and oxygen breathing respirators; filter escape devices; namely, filter-mouthpiece breathing protectors with and without a protective hood or helmet; filters; hoods; protective helmets; ] half-masks, full-masks; all for protection against hazardous atmosphere and injurious environment
Electrical and Scientific Apparatus