CPC Subgroup
H04M 1/276 using magnetic recording, e.g. on tape
Full Title
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 magnetic recording, e.g. on tape
1 direct subcode
Child Classifications
Navigate with arrow keys, Enter to open