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GB621891A
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Process for the nitriding of high chromium ferrous alloys
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GB621890A
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Method of nitriding ferrous metal alloys
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US2437249A
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Method of nitriding
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GB610953A
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Nitriding process
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Process of preparing iron oxide from ferrous chloride
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US2432111A
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Furnace for reducing and distilling volatile metals
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Armor plate construction
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US2445801A
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Method of electric resistance welding a laminated sheet metal structure
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US2083208A
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Structural parts having high permanent strength
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US2057813A
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Process for hardening iron and steel alloys and article produced thereby
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Steel roll composition
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US2033927A
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Process of making a metal article of precise dimensions and the article produced thereby
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US1970141A
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Process for hardening iron, steel, and cast iron alloys by nitriding
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US1991977A
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Steel alloy
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US1958575A
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Process for hardening iron, steel, and cast iron alloys by nitriding
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US1895847A
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Method of hardening metal articles by nitriding
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US2039487A
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Method of nitriding
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US1934672A
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Nitrided steel articles
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Steel die block
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US1737711A
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Hardening metal articles by nitrogenization
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