U.S. federal trademark · Serial No. 76639250 · Reg. No. 3087119
SERIES OF DIFFUSIVE PASSIVE AIR SAMPLERS FOR THE COLLECTION OF AIRBORNE CHEMICAL CONTAMINANTS FOR ANALYSIS TO DETERMINE CONCENTRATION; NAMELY, A HOUSING WITH INLET HOLES FILLED WITH SOLID SORBENT FOR CONTROLLED DIFFUSION OF CONTAMINANTS ONTO SORBENT
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