DIFF Subgroup
G02B 1/02 made of crystals, e.g. rock-salt, semi-conductors (G02B1/08 takes precedence)
Introduced: September 1968
Title
Titles differ between systems:
IPC: made of crystals, e.g. rock-salt, semiconductors
CPC: made of crystals, e.g. rock-salt, semi-conductors (G02B1/08 takes precedence)
Full Title
Full titles differ between systems:
IPC:
Optical elements characterised by the material of which they are made; Optical coatings for optical elements > made of crystals, e.g. rock-salt, semiconductors
CPC:
Optical elements characterised by the material of which they are made; Optical coatings for optical elements > made of crystals, e.g. rock-salt, semi-conductors (G02B1/08 takes precedence)
No child classifications to compare. This is a leaf node in both IPC and CPC.