71387192
Dec 28, 1936
May 4, 1937
ELECTRIC FURNACES AND OVENS, ELECTRIC HEAT-TREATING FURNACES AND OVENS, AND REAGENT-TREATING RETORTS, FOR CASE-FORMING CARBURIZATION AND FOR PREVENTION OF DECARBURIZATION OF FERROUS METALS, STEELS, AND ALLOYS; AND FOR PARTS AND ACCESSORIES OF AND FOR THE AFORESAID FURNACES, OVENS, AND RETORTS
Housewares and Glass