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Tunnel oven and wagon
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Patent number 4,504,221
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Issue date Mar 12, 1985
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Entreprise Hartmann Pere et Fils
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Michel Hartmann
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F27 - FURNACES KILNS OVENS RETORTS
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3035323
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Patent number 3,035,323
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Issue date May 22, 1962
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F27 - FURNACES KILNS OVENS RETORTS
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2207412
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Patent number 2,207,412
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Issue date Jul 9, 1940
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F27 - FURNACES KILNS OVENS RETORTS
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1898042
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Patent number 1,898,042
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Issue date Feb 21, 1933
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F27 - FURNACES KILNS OVENS RETORTS
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1738040
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Patent number 1,738,040
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Issue date Dec 3, 1929
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F27 - FURNACES KILNS OVENS RETORTS
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1693152
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Patent number 1,693,152
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Issue date Nov 27, 1928
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F27 - FURNACES KILNS OVENS RETORTS
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1560618
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Patent number 1,560,618
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Issue date Nov 10, 1925
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F27 - FURNACES KILNS OVENS RETORTS