Show PATENTS RECENTLY ISSUED reported for the mining review by R W bishop patent attorney washington D C hydraulic gold mining F J hoyt chicago il 11 rock cutting drill bit lafayette durker denver colo assignor to mine smelter supply co same place miners electric lamp H ag G camden town england hinge for mine doors thompson jeffrey pittsburg ky ore grinder W G stockton tal cal process of ores paul naef new york N Y concentrator D M storey weeping water bebr prospecting instrument milton chase haverhill mass and process of and apparatus for extracting metals by electrolysis H R cassel new york N Y extensible flume patrick maginnis kimball bebr smelting smelling Sm elting furnace matilda L trapp los angeles cal power hammer and rock drill julius kraus cuyahoga Cuya hoga falls ohio stamp mill G C richards berkeley cal assignor of one half to herman murphy san francisco cal metallurgical furnace W S dempsey new york N Y process of separating zinc blende from ores william jamieson and F J melbourne victoria concentrator W G anderson san francisco cal rabble for ore roasting furnaces A ae E John johnson san colorado springs colo amalgamator and concentrator J B rossman st paul minn I 1 gold saving apparatus louis sachse los angeles cal |