Electron tubes, also known as vacuum tubes

Fumigating apparatus (not medicated) for hygienic purposes. Machinery included in this class; electric toasters; electric kettles; electric coffee percolators; electric urns; electric fish friers; glass illuminating signs; lamp bulbs; reflectors; noon indicators and letter lamps; illuminating glassware; glass shades; well glass fittings; porcelain or earthenware furnaces, lamp holders, melting pots and ceiling roses, water heaters, bath heaters, sink beaters, heating apparatus including hot plates, boiling plates, warming plates, radiators, fires and air heaters, heating systems, steaming, roasting and baking ovens, bains-marie, hot cupboards, electric cookers and ranges, drying and warming ovens, fish and doughnut friers, stills and pressure cookers, ventilating apparatus; air conditioning apparatus, lighting contrivances; metal parts of heating and illuminating systems, sterilizing utensils, glue and wax heaters, wash boilers, curling iron heaters, liquid boilers, boiling tables, single and multiple type urns, toasters, urns, lamp holders, grillers, torches, lamps, spotlights, flood lights, reflectors, fans, illuminated signs and bed warmers