Patent classifications
H
ELECTRICITY
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H04
ELECTRIC COMMUNICATION TECHNIQUE
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H04B
TRANSMISSION
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15/00
Suppression or limitation of noise or interference
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H04B15/02
Reducing interference from electric apparatus by means located at or near the interfering apparatus
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H04B15/04
the interference being caused by substantially sinusoidal oscillations, e.g. in a receiver or in a tape-recorder
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H04B15/06
by local oscillators of receivers
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