DIFF Subgroup
H01S 3/22 Gases
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range > characterised by the material used as the active medium > Gases
CPC:
Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range (semiconductors lasers H01S5/00) > characterised by the material used as the active medium > Gases
CPC subdivides this area 3x more granularly than IPC with 3 additional codes.
3 codes are CPC-only extensions.
1 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 1974.
Child Classifications
Navigate with arrow keys, Enter to open
- H01S 3/223 the active gas being polyatomic, i.e. containing two or more atoms (H01S3/227 takes precedence) since 1974 +3 CPC IPC+CPC Available in IPC and CPC