H01J 41/02 Discharge tubes for measuring pressure of introduced gas
Introduced: July 1974
Title
Titles differ between systems:
IPC: Discharge tubes and means integral therewith for measuring gas pressure
CPC: Discharge tubes for measuring pressure of introduced gas
Full Title
Full titles differ between systems:
Discharge tubes and means integral therewith for measuring gas pressure; Discharge tubes for evacuation by diffusion of ions > Discharge tubes and means integral therewith for measuring gas pressure
Discharge tubes for measuring pressure of introduced gas ; Discharge tubes for evacuation by diffusion of ions > Discharge tubes for measuring pressure of introduced gas
IPC and CPC are identically structured here. All 4 subcodes exist in both systems.
1 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 1974.
Child Classifications
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- H01J 41/04 with ionisation by means of thermionic cathodes since 1974 IPC+CPC Available in IPC and CPC
- H01J 41/08 with ionisation by means of radioactive substances, e.g. alphatrons since 1974 IPC+CPC Available in IPC and CPC
- H01J 41/10 of particle spectrometer type (particle spectrometers per se H01J49/00) since 1974 IPC+CPC Available in IPC and CPC