21 [ HIGH FREQUENCY ELECTRONIC POWER GENERATING AND HEATING APPARATUS FOR USE IN TREATMENT OF MATERIALS, AND FINAL PRODUCTS, IN INDUSTRIAL PROCESSES SUCH AS HARDENING OF METAL SURFACES, SOLDERING, WELDING, BONDING OF WOOD AND WOOD VENEERS, DETONATING EXPLOSIVE RIVETS, DRYING OF PAINTS, BONDING OF THERMOPLASTIC SHEETS, DRYING OF DIELECTRIC MATERIALS, SUCH AS RAYON, CONTAINING ABSORBED WATER OR SOLVENT LIQUIDS WHERE EXCESSIVE OUTSIDE TEMPERATURE WOULD CAUSE SURFACE HARDENING OF THE MATERIAL BEING DRIED; ] ELECTRIC SOUND RECORDING AND REPRODUCING APPARATUS [ , ELECTRIC CHIME UNITS, ELECTRIC CARILLONS, ELECTRIC CARILLON CONTROL KEYBOARDS, ELECTRIC MOTORS, DRY BATTERIES, AND PARTS THEREOF ]
Trademark: 71490259
