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PCE
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DIFF Subgroup
H04M 1/62

Constructional arrangements

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Substation equipment, e.g. for use by subscribers > including speech amplifiers > Constructional arrangements

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) > including speech amplifiers > Constructional arrangements

No child classifications to compare. This is a leaf node in both IPC and CPC.