HSektion H — ElektrotechnikSECTION H — ELECTRICITY
disable hierarchy mode: H04H04Elektrische NachrichtentechnikELECTRIC COMMUNICATION TECHNIQUE
disable hierarchy mode: H04QLink to definition of IPC symbol: H04QH04QWähltechnik (Schalter, Relais, Wähler H01H; drahtlose Nachrichtenübertragungsnetzwerke H04W) [1, 2009.01]SELECTING (switches, relays, selectors H01H;  wireless communication networks H04W) [1, 2009.01]
disable hierarchy mode: H04Q 3/00Link to definition of IPC symbol: H04Q 3/00Link to Depatisnet beginner's search with IPC symbol: H04Q 3/00H04Q 3/00Wählanordnungen (H04Q 5/00-H04Q 11/00 haben Vorrang)Selecting arrangements (H04Q 5/00-H04Q 11/00 take precedence)
disable hierarchy mode: H04Q 3/18Link to Depatisnet beginner's search with IPC symbol: H04Q 3/18H04Q 3/18
. Schaltungsanordnungen für die Freiwahl
. Circuit arrangements for first stage of hunting switching
disable hierarchy mode: H04Q 3/24Link to Depatisnet beginner's search with IPC symbol: H04Q 3/24H04Q 3/24
. . für Anrufsucher
. . for line finders
disable hierarchy mode: H04Q 3/26Link to Depatisnet beginner's search with IPC symbol: H04Q 3/26H04Q 3/26
. . . mit gemeinsamer Schaltung zum Rufen und zum Trennen einer Verbindung
. . . comprising common calling and disconnecting circuit