GB588633A
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Improvements in or relating to apparatus for the heat treatment of cylindrical or such like surfaces
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GB584808A
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Improvements in or relating to apparatus for hardening the surface of ferrous metal articles
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GB570002A
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Improvements in or relating to the surface hardening of ferrous metal bodies
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GB567172A
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Improvements in or relating to the surface hardening of hollow ferrous metal articles
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GB584791A
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Improvements in or relating to the surface hardening of metal articles
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GB566249A
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Improvements in or relating to the production of shaped ferrous metal parts having surface hardened profiles
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GB564012A
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Method of and means for hardening internal surface portions of metal articles
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GB563919A
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Improvements in or relating to the flame treatment of the internal surfaces of bores
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GB562347A
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Improvements in or relating to the surface hardening of ferrous metal articles
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GB571438A
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Improvements in or relating to the heat treatment of metal articles
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GB572930A
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Improvements in or relating to the surface hardening of metal articles
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GB572474A
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Improvements in or relating to the surface heat treatment of ferrous metal bodies
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GB551018A
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Improvements in or relating to the heat treatment of metal surfaces
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GB547931A
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Improvements in or relating to apparatus for the heat treatment of internal metal surfaces
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GB541317A
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Improvements in or relating to blowpipe apparatus
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GB533774A
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Improvements in or relating to apparatus for heat treating metal bodies
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GB523823A
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Improvements in or relating to a method of and apparatus for heat-treating metal bodies
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GB518495A
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Improvements in or relating to methods of and apparatus for the surface heat-treating or hardening of metal bodies
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GB518494A
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Improvements in or relating to blowpipes and methods of producing jets
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GB509266A
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Improvements in or relating to the surface hardening of metal articles such as the teeth of gear wheels, sprocket wheels or other toothed members
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