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Patent classifications
H
ELECTRICITY
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H04
ELECTRIC COMMUNICATION TECHNIQUE
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H04Q
SELECTING
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11/00
Selecting arrangements for multiplex systems
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H04Q11/04
for time-division multiplexing
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H04Q11/0428
Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
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H04Q11/0435
Details
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H04Q11/0442
Exchange access circuits
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