73651134
Mar 20, 1987
May 31, 1988
FILTER SHEETS [ FOR ] * OF * ORGANIC AND/OR INORGANIC FIBERS AND POWDERS; FILTER CARTONS; FILTER MEMBRANES; COMPOSITE FILTERS MADE OF FILTER MEMBRANES AND FILTER SHEETS OR OF FILTER MEMBRANES AND FILTER CARTONS; FILTER CARTRIDGES; ALL OF THE AFORE-MENTIONED GOODS FOR LIQUID OR GAS FILTRATION
Environmental Control Apparatus