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Start code for signalling bits
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Patent number 5,627,592
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Issue date May 6, 1997
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U.S. Philips Corporation
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Johannes Y. Tichelaar
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Letterbox television system
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Patent number 5,534,932
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Issue date Jul 9, 1996
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U.S. Philips Corporation
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Adrianus C. J. G. Van de Waterlaat
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Television systems
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Patent number 5,426,465
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Issue date Jun 20, 1995
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British Broadcasting Corporation
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John O. Drewery
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Television signals
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Patent number 5,053,857
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Issue date Oct 1, 1991
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British Broadcasting Corporation
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Charles P. Sandbank
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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