75580130
Oct 30, 1998
Apr 30, 2002
DESIGN OF ENERGY RECOVERY SYSTEMS COMPRISING AIR-TO-AIR ENERGY EXCHANGERS AND ENVIRONMENTAL ACOUSTIC PRODUCTS, NAMELY, DUCT ELEMENTS FOR USE IN AIR DISTRIBUTION SYSTEMS AND AIR-CONDITIONING SYSTEMS WHICH ATTENUATE NOISE GENERATED BY AIR FLOWING THROUGH SUCH SYSTEMS, FOR OTHERS
Computer and Scientific