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US2712510A
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Improving properties of metals
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US2683675A
|
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Process of treating metal with an aqueous slurry
|
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US2529344A
|
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Composition for imparting rustinhibiting finish to iron articles
|
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US2551957A
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Method of surfacing metallic articles
|
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US2529345A
|
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Method of durably finishing iron articles and composition therefor
|
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US2311344A
|
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Means for bathing workpieces in a controlled atmosphere
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US2224404A
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Furnace
|
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US2188226A
|
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Method of casing ferrous articles
|
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US2143128A
|
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Needle point burner
|
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US2142139A
|
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Hardening process for high speed steel tools and other articles
|
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US1995314A
|
|
Process of casing steel articles
|
|
US2021072A
|
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Continuous heat treating machine
|
|
US2003970A
|
|
Bell retort furnace
|
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US1921128A
|
|
Finish for ferrous articles
|
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US1938599A
|
|
Carburizing apparatus
|
|
US1899764A
|
|
Gas-measuring device
|
|
US1808145A
|
|
Brass-melting apparatus
|
|
US1789149A
|
|
Brass-melting furnace
|
|
US1745104A
|
|
Carburizing process
|
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US1713543A
|
|
Furnace for melting metals
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