Patent classifications
H
ELECTRICITY
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H04
ELECTRIC COMMUNICATION TECHNIQUE
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H04N
PICTORIAL COMMUNICATION, e.g. TELEVISION
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5/00
Details of television systems
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H04N5/44
Receiver circuitry; for the reception of television signals according to analogue transmission standards;
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H04N5/57
Control of contrast or brightness
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H04N5/58
in dependence upon ambient light
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