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US2172350A
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Screw connection
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GB499001A
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Improvements in and relating to the insertion of metal screw threads into boards, plates or other articles of wood, linoleum and the like
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GB479192A
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Improvements in catch gear for vertically adjustable lamp pendants
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US2156338A
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Screw-threaded connecting means
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GB433477A
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Improvements in pipe and rod couplings
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DE605536C
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Coupling for pipes and rods, especially for tubular steel furniture
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GB281306A
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A process and devices for providing metal screw threads male or female on or in elements of wood or other relatively compressible material
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US1816282A
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Method and tool for securing wire screw-threads to wooden members
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