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Ring shaped cooling device
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Patent number 4,077,136
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Issue date Mar 7, 1978
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Krupp-Koppers GmbH
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Johannes Lorrek
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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3739495
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Patent number 3,739,495
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Issue date Jun 19, 1973
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F27 - FURNACES KILNS OVENS RETORTS
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3707280
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Patent number 3,707,280
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Issue date Dec 26, 1972
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3309787
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Patent number 3,309,787
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Issue date Mar 21, 1967
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F28 - HEAT EXCHANGE IN GENERAL
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3243893
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Patent number 3,243,893
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Issue date Apr 5, 1966
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F27 - FURNACES KILNS OVENS RETORTS
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3232714
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Patent number 3,232,714
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Issue date Feb 1, 1966
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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2892265
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Patent number 2,892,265
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Issue date Jun 30, 1959
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F27 - FURNACES KILNS OVENS RETORTS
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2822078
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Patent number 2,822,078
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Issue date Feb 4, 1958
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F27 - FURNACES KILNS OVENS RETORTS
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2792924
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Patent number 2,792,924
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Issue date May 21, 1957
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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2669032
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Patent number 2,669,032
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Issue date Feb 16, 1954
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F27 - FURNACES KILNS OVENS RETORTS
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2480727
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Patent number 2,480,727
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Issue date Aug 30, 1949
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F27 - FURNACES KILNS OVENS RETORTS
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2480726
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Patent number 2,480,726
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Issue date Aug 30, 1949
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F27 - FURNACES KILNS OVENS RETORTS
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2239246
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Patent number 2,239,246
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Issue date Apr 22, 1941
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F27 - FURNACES KILNS OVENS RETORTS
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2225283
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Patent number 2,225,283
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Issue date Dec 17, 1940
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F27 - FURNACES KILNS OVENS RETORTS
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1989662
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Patent number 1,989,662
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Issue date Feb 5, 1935
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F27 - FURNACES KILNS OVENS RETORTS
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1172576
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Patent number 1,172,576
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Issue date Feb 22, 1916
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F26 - DRYING
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608385
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Patent number 608,385
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Issue date Aug 2, 1898
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F26 - DRYING
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483923
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Patent number 483,923
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Issue date Oct 4, 1892
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F26 - DRYING
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359284
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Patent number 359,284
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Issue date Mar 15, 1887
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F26 - DRYING
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103744
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Patent number 103,744
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Issue date May 31, 1870
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F26 - DRYING
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31827
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Patent number 31,827
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Issue date Mar 26, 1861
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F26 - DRYING