IPC Definitions - January 01, 2012

H04B 3/00 - Definition fr

Definition statement

This main group covers:

Transmission systems characterized by the medium being electrical conductors (e.g. wires, metal cables) or waveguides.

References relevant to classification in this main group

This main group does not cover:

Alarm systems using power transmission lines

G08B 25/06

Informative references

Attention is drawn to the following places, which may be of interest for search:

Communication cables or conductors

H01B 11/00

Waveguides; Resonators, lines or other devices of the waveguide type

H01P

Circuit arrangements for providing remote indication of network condition

H02J 13/00