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Optical communications network
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Patent number 7,376,138
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Issue date May 20, 2008
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British Telecommunications public limited company
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David Cotter
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Bit differential processing
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Patent number 7,081,979
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Issue date Jul 25, 2006
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Corning Incorporated
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David Cotter
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G06 - COMPUTING CALCULATING COUNTING
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Communication network
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Patent number 6,959,151
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Issue date Oct 25, 2005
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British Telecommunications public limited company
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David Cotter
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Communications network
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Patent number 6,714,552
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Issue date Mar 30, 2004
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British Telecommunications public limited company
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David Cotter
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Optical telecommunications network
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Patent number 6,069,720
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Issue date May 30, 2000
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British Telecommunications public limited company
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David Cotter
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Optical and gate
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Patent number 5,987,040
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Issue date Nov 16, 1999
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British Telecommunications public limited company
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Derek Nesset
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G02 - OPTICS
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Optical telecommunications network
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Patent number 5,912,753
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Issue date Jun 15, 1999
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British Telecommunications public limited company
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David Cotter
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Optically encoded signals
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Patent number 5,900,956
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Issue date May 4, 1999
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British Telecommunications public limited company
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David Cotter
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G06 - COMPUTING CALCULATING COUNTING
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Optical packet processing
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Patent number 5,831,752
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Issue date Nov 3, 1998
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British Telecommunications public limited company
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David Cotter
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Optical homodyne detection
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Patent number 4,977,620
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Issue date Dec 11, 1990
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British Telecommunications plc
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David W. Smith
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G02 - OPTICS
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Mode locked laser light sources
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Patent number 4,665,524
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Issue date May 12, 1987
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British Telecommunications p.l.c.
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David Cotter
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H01 - BASIC ELECTRIC ELEMENTS
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Optical transmission
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Patent number 4,560,246
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Issue date Dec 24, 1985
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British Telecommunications
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David Cotter
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H04 - ELECTRIC COMMUNICATION TECHNIQUE