Show PATENTS RECENTLY ISSUED reported specially for this paper by R W bishop patent pat ent attorney washington D C tunneling machine C A case new york 0 N Y assignor to case tunnel engineering co same place percussion machine wilhelm mauss brakman Br akpan transvaal Trans faal process of treating iron ore C B morgan oakland cal cartridge for mining purposes edward and samuel purcell pontefract england electromagnetic stamp battery v J P lynn trafalgar western australia mining machine edward mulberry kans concentrator H P curtis curtis denver colo assignor to the curtis dry placer machine co same place combined mining and track tool too W L groom coal valley ala concentrator W M sanders marion ky oscillating screen A B col cord kokomo kokomos colo assignor to R B me mc conney and C L buckingham denvert denver colo rock drill lubrication J A thompson and bi M mackie chicago ill assignors assigners assign ors to chicago pneumatic tool co same place |