GB560248A
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Improvements relating to pipe coupling devices
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GB517156A
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Improvements relating to pipe coupling devices
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GB429446A
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Improvements relating to pipe end fittings
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GB395536A
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Improvements relating to pipe couplings
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GB394413A
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Improvements in pipe couplings
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GB394354A
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Improvements in pipe couplings
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IE11127L
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Pipe coupling
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GB324855A
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Improved pipe coupling
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GB244253A
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Improvements in or relating to joints and couplings for pipes and tubes
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GB210342A
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Improved joint and coupling for pipes and tubes
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