Methods of retrieving data

Introduced: January 2020

Full Title

Full titles differ between systems:

IPC:

Substation equipment, e.g. for use by subscribers > Devices for calling a subscriber > Devices whereby a plurality of signals may be stored simultaneously > with provision for storing more than one subscriber number at a time > using static electronic memories, e.g. chips > Methods of retrieving data

CPC:

Substation equipment, e.g. for use by subscribers (subscriber services or facilities provided at exchanges H04M3/00; prepayment telephone coin boxes H04M17/00; current supply arrangements H04M19/08) > Devices for calling a subscriber (H04M1/66 takes precedence) > Devices whereby a plurality of signals may be stored simultaneously > with provision for storing more than one subscriber number at a time > using static electronic memories, e.g. chips > Methods of retrieving data

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

IPC defines codes here since 2020.

Child Classifications

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H04M 1/2747 Scrolling on a display since 2020 IPC+CPC Available in IPC and CPC
H04M 1/27475 using interactive graphical means or pictorial representations since 2020 IPC+CPC Available in IPC and CPC
H04M 1/2748 by matching character strings since 2020 IPC+CPC Available in IPC and CPC