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Oven mercury retorting device
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Patent number 5,891,216
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Issue date Apr 6, 1999
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Summit Valley Equipment and Engineering, Inc.
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Charles H. Washburn
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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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3768995
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Patent number 3,768,995
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Issue date Oct 30, 1973
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3271021
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Patent number 3,271,021
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Issue date Sep 6, 1966
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3262774
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Patent number 3,262,774
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Issue date Jul 26, 1966
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3198505
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Patent number 3,198,505
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Issue date Aug 3, 1965
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3097835
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Patent number 3,097,835
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Issue date Jul 16, 1963
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3033674
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Patent number 3,033,674
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Issue date May 8, 1962
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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2931059
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Patent number 2,931,059
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Issue date Apr 5, 1960
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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2863758
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Patent number 2,863,758
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Issue date Dec 9, 1958
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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2536365
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Patent number 2,536,365
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Issue date Jan 2, 1951
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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2493823
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Patent number 2,493,823
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Issue date Jan 10, 1950
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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2457552
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Patent number 2,457,552
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Issue date Dec 28, 1948
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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2349619
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Patent number 2,349,619
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Issue date May 23, 1944
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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2132858
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Patent number 2,132,858
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Issue date Oct 11, 1938
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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2126325
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Patent number 2,126,325
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Issue date Aug 9, 1938
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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2096779
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Patent number 2,096,779
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Issue date Oct 26, 1937
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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2067085
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Patent number 2,067,085
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Issue date Jan 5, 1937
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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1983025
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Patent number 1,983,025
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Issue date Dec 4, 1934
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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1981028
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Patent number 1,981,028
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Issue date Nov 20, 1934
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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1968413
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Patent number 1,968,413
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Issue date Jul 31, 1934
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...