IPC Definitions - January 01, 2012
H04B 3/00 - Definition
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 |
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 |