CPC Subgroup Additional Only
H01J 2229/075 Beam passing apertures, e.g. geometrical arrangements
Full Title
Details of cathode ray tubes or electron beam tubes (H01J2329/00 takes precedence) > Shadow masks > Aperture plate > Beam passing apertures, e.g. geometrical arrangements
1 direct subcode
Child Classifications
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- H01J 2229/0755 characterised by aperture shape