Show 0 PATENTS RECENTLY ISSUED reported for the mining review by davis davis patent attorneys washing ton D C apparatus for electrical separation henry wentworth newton mass process of separating solids from liquids wilbur hendryx den denver ver colo magnetic separator walter B moore seattle wash W ash pulverizing mill arvin gore denver colo amalgamating machine john S rayburn grand junction colo ore separating or concentrating machine walter R lins philadelphia pa diffusion process john stewart logan utah means for extracting gold from river beds john H batten jamestown calif jig frank L buchanan st louis mo gold saving apparatus W wm rm H hackney national soldiers home calif ore concentration henry L sulman henry H greenway and ar arthur H higgins london england diffusion apparatus john stewart logan utah ore concentrator seth R swain denver colo ore mineral and coal coal breaker isaac chrict tamaqua and henry K christ mahoney city pa amalgamating riffle ezra S holt san luis obispo calif centrifugal pulverizing mill edward H henry bethlehem pa process of treating precious metal bearing materials paul W avery and eugene C knowles deadwood S D |