Show PATENTS RECENTLY ISSUED prepared for the mining alining review by davis davis patent attorneys washington process of disintegrating molten slag J G ber bergguist guist chicago ill quartz mill H S rankin cripple creek colo pan motion belt concen concentrator K senn alameda calif sintering wintering Sint ering or roasting furnace ina M H kauffman denver colo ore concentrator J S hunter lamar colo mining alining machine P J kelley and J S kelley pana apparatus for treating ores in preparation for magnetic 0 separation J B etherington t winthrop blass ass |