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US3039334A
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Screw thread cold-rolling machine
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GB893925A
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Screw thread cold-rolling machine
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DE1134959B
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Machine for cold rolling threads
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ES258523A1
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Machine for the cold lamination of the screw filters (Machine-translation by Google Translate, not legally binding)
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US1525536A
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Process of manufacturing screw taps or similar thread-cutting tools
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GB192681A
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An improved method for the manufacture of screw taps or similar screw cutting tools
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DE397295C
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Process for the production of taps
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GB123975A
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Improvements in Sparking Plugs.
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GB191503439A
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Improvements in Sparking-plugs for Internal Combustion Motors.
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US985791A
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Junction-box for sparking plugs.
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GB191012593A
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A Device for Leading Current to the Sparking Plugs of Combustion Engines.
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CA646823A
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Screw thread cold-rolling machine
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