Patent classifications
H
ELECTRICITY
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H04
ELECTRIC COMMUNICATION TECHNIQUE
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H04J
MULTIPLEX COMMUNICATION
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H04J14/02
Wavelength-division multiplex systems
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H04J14/0201
Add-and-drop multiplexing
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H04J14/0202
Arrangements therefor
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H04J14/0205
Select and combine arrangements, e.g. with an optical combiner at the output after adding or dropping
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