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Apparatus for metal purification
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Patent number 6,838,045
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Issue date Jan 4, 2005
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Dowa Mining Co., Ltd.
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Kishio Tayama
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Process for producing high-purity metals
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Patent number 6,814,779
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Issue date Nov 9, 2004
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Dowa Mining Co., Ltd.
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Kishio Tayama
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Distillation column tray
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Patent number 5,264,083
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Issue date Nov 23, 1993
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Metaleurop S.A.
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Richard Kollar
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Process for recovering zinc
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Patent number 4,323,391
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Issue date Apr 6, 1982
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Toho Aen Kabushiki Kaisha
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Tsuneo Honda
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3778044
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Patent number 3,778,044
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Issue date Dec 11, 1973
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3504898
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Patent number 3,504,898
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Issue date Apr 7, 1970
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3463473
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Patent number 3,463,473
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Issue date Aug 26, 1969
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3414401
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Patent number 3,414,401
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Issue date Dec 3, 1968
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3411759
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Patent number 3,411,759
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Issue date Nov 19, 1968
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3300300
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Patent number 3,300,300
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Issue date Jan 24, 1967
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3149194
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Patent number 3,149,194
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Issue date Sep 15, 1964
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3080227
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Patent number 3,080,227
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Issue date Mar 5, 1963
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3045995
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Patent number 3,045,995
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Issue date Jul 24, 1962
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3031296
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Patent number 3,031,296
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Issue date Apr 24, 1962
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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2983493
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Patent number 2,983,493
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Issue date May 9, 1961
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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2983494
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Patent number 2,983,494
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Issue date May 9, 1961
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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2956871
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Patent number 2,956,871
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Issue date Oct 18, 1960
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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2929691
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Patent number 2,929,691
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Issue date Mar 22, 1960
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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2447369
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Patent number 2,447,369
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Issue date Aug 17, 1948
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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2287038
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Patent number 2,287,038
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Issue date Jun 23, 1942
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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2218806
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Patent number 2,218,806
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Issue date Oct 22, 1940
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...