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Welder's windguard
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844426 Alberta Ltd.
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Vacuum refining furnace
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Nippon Steel Corporation
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Kensuke Shimomura
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C21 - METALLURGY OF IRON
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3904592
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Issue date Sep 9, 1975
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F27 - FURNACES KILNS OVENS RETORTS
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3884882
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Patent number 3,884,882
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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3695602
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Patent number 3,695,602
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Issue date Oct 3, 1972
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C21 - METALLURGY OF IRON
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3674903
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Patent number 3,674,903
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Issue date Jul 4, 1972
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C21 - METALLURGY OF IRON
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3632097
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Patent number 3,632,097
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Issue date Jan 4, 1972
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C21 - METALLURGY OF IRON
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3401226
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Patent number 3,401,226
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Issue date Sep 10, 1968
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F27 - FURNACES KILNS OVENS RETORTS
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3386722
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Patent number 3,386,722
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Issue date Jun 4, 1968
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C21 - METALLURGY OF IRON
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3381951
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Patent number 3,381,951
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C21 - METALLURGY OF IRON
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3345058
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Patent number 3,345,058
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C21 - METALLURGY OF IRON
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256038
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B22 - CASTING POWDER METALLURGY