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BG40949A1
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Alternating current electric luminescence panel
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BG37043A1
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Xerographic element
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BG36760A1
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Device for applying layers
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BG39440A1
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Device for autonomous control of printing appliances
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BG39619A1
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Cem - conductive electrode
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BG37219A1
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Method for preparing btnder electroluminiscent layers
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BG36919A1
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Semi- conductor electroluminiscent element
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BG36039A1
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Semiconductor alternating current electroluminiscent element
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BG30894A1
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Elektrophotographical element for operating in photodielectric regime
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BG30588A1
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Electrophotographical element for xerograph regime operation
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BG30439A2
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Electrophotographical element for working in photodielectric regime
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BG29909A1
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Method for obtaining of heterogenous layers over base
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