73283900
Oct 30, 1980
ELECTRICALLY OPERATED PROTECTIVE SYSTEMS, VISIBLE AND AUDIBLE, AND COMBINATIONS OF BOTH, FOR DETECTING FIRE, BURGLARY, AND HOLDUP AND COMPONENTS AND PARTS FOR SUCH SYSTEMS
Electrical and Scientific ApparatusINSPECTING AND REPAIRING ELECTRICALLY OPERATED PROTECTIVE SYSTEMS, VISIBLE ANDAUDIBLE, AND COMBINATIONS OF BOTH, FOR DETECTING FIRE, BURGLARY, AND HOLDUP
Building Construction and RepairMONITORING ELECTRICALLY OPERATED PROTECTIVE SYSTEMS, VISIBLE AND AUDIBLE,AND COMBINATIONS OF BOTH, FOR DETECTING FIRE, BURGLARY AND HOLDUP
Computer and Scientific