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Optical networks
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Patent number 4,897,830
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Issue date Jan 30, 1990
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British Telecommunications, public limited company
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Godfrey R. Hill
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Movable member mounting
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Patent number 4,871,244
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Issue date Oct 3, 1989
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British Telecommunications Public Limited Company
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Ian W. Stanley
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G02 - OPTICS
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Radiation deflector assembly
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Patent number 4,854,658
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Issue date Aug 8, 1989
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British Telecommunications Public Limited Company
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Ian W. Stanley
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G02 - OPTICS
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