76276509
Jun 21, 2001
Jun 11, 2002
COMPONENT PARTS OF CENTRAL VACUUM CLEANERS, NAMELY, AN ELECTRONIC INTERFACE COMPRISED OF INTEGRATED CIRCUITS BETWEEN A CENTRAL VACUUM AND MECHANICAL VENTILATION SYSTEM
MachineryELECTRONIC INTERFACE COMPRISED OF INTEGRATED CIRCUITS BETWEEN A CENTRAL VACUUM AND MECHANICAL VENTILATION SYSTEM
Electrical and Scientific Apparatus