IPC Definitions - January 01, 2012

G21K 4/00 - Definition fr

Informative references

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

Photographic processes using X-rays; using screens to intensify X-ray images

G03C 5/16, G03C 5/17

In discharge tubes: screens on or from which an image or pattern is formed; luminescent screens

H01J 1/54, H01J 1/62

In cathode ray tubes or electron beam tubes: image conversion tubes or image amplification tubes having an X-ray input and an optical output

H01J 31/50