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Arc tube for a discharge lamp
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Patent number 5,099,174
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Issue date Mar 24, 1992
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THORN EMI plc
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George E. Coxon
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Discharge lamp arc tubes
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Patent number 4,694,219
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Issue date Sep 15, 1987
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THORN EMI plc
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Peter Hing
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Discharge lamp arc tubes
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Patent number 4,585,972
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Issue date Apr 29, 1986
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Thorn EMI Limited
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Peter Hing
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Cermet materials
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Patent number 4,354,964
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Issue date Oct 19, 1982
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Thorn EMI Limited
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Peter Hing
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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