IPC Definitions - January 01, 2012
C04B 35/50 - Definition
Attention is drawn to the following places, which may be of interest for search:
Luminescent materials containing rare earth metals | C09K 11/77 |
Light filters; Selection of luminescent materials for light screens | F21V 9/16 |
Luminescent screens | H01J 1/63 |
Scintillation detectors | G01T 1/20, G01T 3/06 |