IPC Definitions - January 01, 2012

E21B 47/135 - Definition fr

Definition statement

This group covers:

Processes or apparatus the transmission link is via the infrared, visible or ultraviolet part of the electromagnetic spectrum.

Informative references

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

Optical transmission in general

H04B 10/00

Light guides, e.g. optical fibres

G02B 6/00