IPC Definitions - January 01, 2012

H04J - Definition fr

Definition statement

This subclass covers:

Multiplex Communication having circuits or apparatus for combining or dividing signals for the purpose of transmitting the signals simultaneously or sequentially over the same transmission path, and monitoring arrangements therefor.

Relationship between large subject matter areas

Class H04 Electric communication technique covers electrical communication systems with propagation paths employing beams of corpuscular radiation, acoustic waves or electromagnetic waves. Subclass H04J refers to multiplex communication in general. If the multiplex communication is specially adapted for particular applications classification is made in other subclasses of class H04.

References relevant to classification in this subclass

This subclass does not cover:

Optical monitoring arrangements, independent of the multiplexing method

H04B 10/08

Selecting arrangements for multiplex systems

H04Q 11/00
Examples of places where the subject matter of this class is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Use of multiplexing in transmission systems for measured values, control or similar signals

G08C 15/00

Arrangements for transmission of digital information affording multiple use of the transmission path

H04L 5/00

Systems for the simultaneous or sequential transmission of more than one television signal

H04N 7/08

Informative references

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

Optical elements, systems or apparatus

G02B

Addressing or transmission in computers

G06F 12/00, G06F 13/00

Electronic switching or gating

H03K 17/00

Transmission in general

H04B

Relay systems

H04B 7/14

Broadcast communication

H04H

Data switching networks

H04L 12/00

Modulated-carrier systems

H04L 27/00

Telephonic Communication

H04M

Selecting techniques

H04Q

Stereophonic systems

H04S

Wireless communication networks

H04W