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CA2546504A1
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Enhanced telecommunication system
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WO2005052943A1
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An optical disc player having a read head with dual laser beam sources
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WO2005052921A2
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A method and apparatus for reading data from an optical disc in a reverse direction
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WO2005052919A2
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A method of reading data from a double-sided multi-layered optical disc
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WO2005052920A2
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A method of reading data from the sides of a double-sided optical disc
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WO2005052917A2
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A disc drive or player for reading double-sided optical discs
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WO2005052916A2
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An optical disc writer for making double-sided optical discs
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WO2005052915A2
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Primary examiner: rotational direction indicia with a double-sided optical disc
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WO2005050634A1
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An improved double-sided optical disc
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