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Heat treatment furnace
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Issue date Feb 18, 1992
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Libbey-Owens-Ford Co.
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Dennis M. Csehi
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F27 - FURNACES KILNS OVENS RETORTS
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Lip-hung retort furnace
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Patent number 4,604,055
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Issue date Aug 5, 1986
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Can-Eng Holdings, Ltd.
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Peter B. Mackenzie
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C21 - METALLURGY OF IRON
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3836325
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Patent number 3,836,325
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Issue date Sep 17, 1974
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C21 - METALLURGY OF IRON
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3410594
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C21 - METALLURGY OF IRON
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2469740
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F27 - FURNACES KILNS OVENS RETORTS
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2180075
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Issue date Nov 14, 1939
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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1930467
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Patent number 1,930,467
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Issue date Oct 17, 1933
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C21 - METALLURGY OF IRON
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1727050
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F27 - FURNACES KILNS OVENS RETORTS
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1416034
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F27 - FURNACES KILNS OVENS RETORTS