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Test signalling
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Patent number 7,978,613
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Issue date Jul 12, 2011
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British Telecommunications public limited company
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Philip Gray
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Analysis of video signal quality
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Patent number 7,715,592
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Issue date May 11, 2010
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British Telecommunications public limited company
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Michael P. Hollier
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Test signalling
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Patent number 7,050,924
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Issue date May 23, 2006
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British Telecommunications public limited company
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Antony W Rix
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Measurement of signal quality
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Patent number 6,718,296
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Issue date Apr 6, 2004
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British Telecommunications public limited company
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Richard J B Reynolds
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Reproduction of spatialized audio
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Patent number 6,694,033
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Issue date Feb 17, 2004
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British Telecommunications public limited company
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Andrew Rimell
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Signal processing
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Patent number 6,512,538
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Issue date Jan 28, 2003
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British Telecommunications public limited company
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Michael Peter Hollier
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Measurement of signal quality
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Patent number 6,389,111
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Issue date May 14, 2002
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British Telecommunications public limited company
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Michael P Hollier
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Testing telecommunications equipment
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Patent number 6,304,634
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Issue date Oct 16, 2001
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British Telecomunications public limited company
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Michael P Hollier
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Telecommunications system
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Patent number 6,044,147
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Issue date Mar 28, 2000
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British Teledommunications public limited company
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Michael Peter Hollier
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Training process
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Patent number 5,799,133
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Issue date Aug 25, 1998
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British Telecommunications public limited company
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Michael P. Hollier
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Noise-cancelling handset
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Patent number 5,341,420
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Issue date Aug 23, 1994
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British Telecommunications public limited company
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Michael P. Hollier
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H04 - ELECTRIC COMMUNICATION TECHNIQUE