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Emitterless SDN electrode
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Patent number 4,910,433
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Issue date Mar 20, 1990
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U.S. Philips Corp.
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Cornelis A. J. Jacobs
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H01 - BASIC ELECTRIC ELEMENTS
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Metal vapor discharge lamp
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Patent number 4,223,247
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Issue date Sep 16, 1980
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U.S. Philips Corporation
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Cornelis A. J. Jacobs
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H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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Electric discharge lamp
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Patent number 4,052,635
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Issue date Oct 4, 1977
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U.S. Philips Corporation
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Cornelis Adrianus Joannes Jacobs
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H01 - BASIC ELECTRIC ELEMENTS
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Electric discharge lamp
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Patent number 4,011,480
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Issue date Mar 8, 1977
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U.S. Philips Corporation
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Cornelis Adrianus Joannes Jacobs
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H01 - BASIC ELECTRIC ELEMENTS