DIFF Subgroup
H01J 3/20 Magnetic lenses
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Details of electron-optical or ion-optical arrangements common to two or more basic types of discharge tubes or lamps > Arrangements for focusing or reflecting ray or beam > Magnetic lenses
CPC:
Details of electron-optical or ion-optical arrangements common to two or more basic types of discharge tubes or lamps > Arrangements for focusing or reflecting ray or beam (H01J3/02, H01J3/04 take precedence) > Magnetic lenses
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
Child Classifications
Navigate with arrow keys, Enter to open