Patent classifications
H
ELECTRICITY
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H04
ELECTRIC COMMUNICATION TECHNIQUE
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H04B
TRANSMISSION
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2201/00
Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
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H04B2201/69
Orthogonal indexing scheme relating to spread spectrum techniques in general
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H04B2201/696
relating to Dowlink
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