DIFF Subgroup
H01J 47/22 characterised by another type of readout
Introduced: January 1980
Full Title
Full titles differ between systems:
IPC:
Tubes for determining the presence, intensity, density or energy of radiation or particles > Parallel electrode spark or streamer chambers; Wire spark or streamer chambers > characterised by another type of readout
CPC:
Tubes for determining the presence, intensity, density or energy of radiation or particles ( ; photoelectric discharge tubes not involving the ionisation of a gas H01J40/00 ) > Parallel electrode spark or streamer chambers; Wire spark or streamer chambers > characterised by another type of readout
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
IPC defines codes here since 1980.
Child Classifications
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