72434228
Aug 30, 1972
Nov 18, 1975
FLAT OR TUBULAR FUSED-QUARTZ INFRA-RED ELECTRIC HEATING UNITS UTILIZING EXTERNAL HEAT IN CURING, DRYING, HEATSETTING, LAMINATING AND COATING OPERATIONS, AND FOR THE THERMOFORMING OF PLASTIC SHEETS, AND OTHER COMMERCIAL APPLICATIONS
Housewares and Glass