75640490
Feb 12, 1999
Oct 3, 2000
METAL DUCTS, SILENCERS IN THE NATURE OF CHAMBERS HAVING ACOUSTIC TREATMENT AND/OR ONE OR MORE ACOUSTICALLY TREATED VANES, PANELS, AND SPLITTERS IN THE NATURE OF ONE OR MORE ACOUSTICALLY TREATED VANES FOR FLOW SEPARATION, ALL LINED WITH ACOUSTIC MATERIALS
Metal GoodsNOISE-SUPPRESSION PRODUCTS IN THE NATURE OF ACOUSTIC SILENCERS IN THE NATURE OF CHAMBERS HAVING ACOUSTIC TREATMENT AND/OR ONE OR MORE ACOUSTICALLY TREATED VANES, PANELS, SPLITTERS IN THE NATURE OF ONE OR MORE ACOUSTICALLY TREATED VANES FOR FLOW SEPARATION, RESONATORS, AND ACOUSTIC TREATMENTS IN THE NATURE OF ACOUSTIC-ABSORBING MATERIAL LAYERS WHICH MAY BE SUPPORTED BY STANDOFFS AND/OR SUPPORTS
Rubber GoodsNONMETAL DUCTS, SILENCERS IN THE NATURE OF CHAMBERS HAVING ACOUSTIC TREATMENT AND/OR ONE OR MORE ACOUSTICALLY TREATED VANES, PANELS, AND SPLITTERS IN THE NATURE OF ONE OR MORE ACOUSTICALLY TREATED VANES FOR FLOW SEPARATION, ALL LINED WITH ACOUSTIC MATERIALS
Nonmetallic Building Materials