IPC Definitions - January 01, 2012
H04J - Definition
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 |
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 |
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 |