H01J2203/0244 - CPC Classification Index

ClassID:

205838 ⎘

H01J2203/0244 - CPC Classification

Classification description:

Electron or ion optical arrangements common to discharge tubes or lamps; Electron guns using cold cathodes, e.g. field emission cathodes; Control electrodes; Focusing electrodes characterised by the form or structure

Sub-classes:

H01J2203/0248 » Shapes or dimensions of focusing electrode openings 2
H01J2203/0252 » Arrangement of focusing electrode openings 0

Recent Application in this class:

20130230146

2013-09-05

Electron emission device and X-ray generator including the same

20120223245

2012-09-06

ELECTRON BEAM SOURCE SYSTEM AND METHOD

20070029919

2007-02-08

Electron emission device having a focus electrode and a fabrication method therefor