IPC Definitions - January 01, 2012

H04Q 1/00 - Definition fr

Informative references

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

Details of selector switches

H01H 63/00

Cables; Conductors

H01B

Installation of communication cables or lines

H02G

Multiplex systems providing for calling or supervisory signals

H04J 1/00, H04J 3/12

Telephone substation equipment

H04M 1/00

Current supply arrangements for telephone systems

H04M 19/00

Synonyms and Keywords

In patent documents the following abbreviations are often used:

MDF

Main Distribution Frame