Show PATENTS RECENTLY ISSUED reported speciale spec ialy for this paper by R W bishop patent attorney washington D C process of treating r refractory ores L V atkinson carshalton Car england Lt gland assignor to the 1 I R refractory ore syndicate limited london england magnetic ore separator joseph weatherby jr new cumberland pa ore separator or filter C P R christensen dull bull frog nevada ore separator and concentrating machine J L hellyer iconium iowa assignor of one half to J C cook russell iowa ore separator alfred schwarz new york N Y assignor to schwarz engineering gi company same place JA process of treating copper south orange N J |