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US4981541A
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Method for joining polyolefin pipes by fusion
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US5007767A
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Method for joining polyolefin pipes by fusion
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GB8620071D0
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Structures of polymeric plastics material
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EP0216486A2
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Acid gas removal process
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EP0250668A1
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Fuel-fired burner
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EP0250667A1
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Control of fluid temperature in a wet central heating system and components suitable for a central heating system
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GB8613969D0
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Ground penetrating tool
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GB8612836D0
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Repairing pipe
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EP0201310A2
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Purification of effluent liquors
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GB8607705D0
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Signal processing
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EP0238736A1
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Seismic pulse generation
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GB8606693D0
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Air-gas ratio control devices
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GB8603245D0
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Lining pipe/main
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GB8531859D0
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Broadband antennas
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GB8531277D0
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Limiting presence of oxides of nitrogen
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US4693404A
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Mains bursting tool
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GB8531157D0
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Recuperative burners
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GB8531174D0
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Valve
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EP0190502A1
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Mains bursting tool
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GB8528758D0
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A modular building element
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