IPC Definitions - January 01, 2012

H04L - Definition fr

Definition statement

This subclass covers:

Transmission of signals having been supplied in digital form, e.g. data transmission, telegraphic communication, or methods or arrangements for monitoring.

As the scope of H04L covers a diversity of subject matter, the user is referred to the definitions for the main groups of H04L. The following list is intended to assist the user.

Systems:

Arrangements of general application:

References relevant to classification in this subclass

This subclass does not cover:

Arrangements applicable to telegraphic or telephonic communication

H04M

Informative references

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

Typewriters

B41J

Order telegraphs, fire or police telegraphs

G08B

Visual telegraphy

G08B, G08C

Teleautographic systems

G08C

Ciphering or deciphering apparatus per se

G09C

Coding, decoding or code conversion, in general

H03M

Selecting

H04Q

Spread spectrum techniques in general

H04B 1/69