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https://www.uspto.gov/web/patents/classification/cpc/html/conH04Qtoipc.html
CPC to IPC Concordance - H04Q
cpc
ipc
concordance
https://www.uspto.gov/web/patents/classification/cpc/html/defH04Q.html
CPC Definition - H04Q SELECTING (switches, relays, selectors H01H; wireless communication networ...
switches relays
wireless communication
cpc
definition
selecting