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Roller track for pipes
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Patent number 4,184,839
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Issue date Jan 22, 1980
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Mannesmann Aktiengesellschaft
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Helmut Landgraf
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C21 - METALLURGY OF IRON
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3230596
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Patent number 3,230,596
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Issue date Jan 25, 1966
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F27 - FURNACES KILNS OVENS RETORTS
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2839282
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Patent number 2,839,282
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Issue date Jun 17, 1958
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F27 - FURNACES KILNS OVENS RETORTS
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2583764
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Patent number 2,583,764
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Issue date Jan 29, 1952
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F27 - FURNACES KILNS OVENS RETORTS
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2423629
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Patent number 2,423,629
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Issue date Jul 8, 1947
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F27 - FURNACES KILNS OVENS RETORTS
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2245181
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Patent number 2,245,181
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Issue date Jun 10, 1941
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F27 - FURNACES KILNS OVENS RETORTS