PI

ANALOG AND DIGITAL TAPE RECORDERS FOR PORTABLE AND LABORATORY USES; VIDEO TAPE RECORDERS FOR CLOSED CIRCUIT TV; INCREMENTAL MOTION TAPE RECORDERS FOR DATA-PROCESSING; MINIATURE TAPE RECORDERS; RADAR SIMULATORS; REEL, FIXED-LOOP AND VARIABLE-DELAY LOOP TAPE MAGAZINES; MOTOR DRIVE AMPLIFIERS; TELEMETRY DISCRIMINATORS; AND ACCESSORIES FOR USE WITH TAPE RECORDERS