H01J 31/66
Having means for allowing all but selected cross-section elements of a homogeneous
Official title: having means for allowing all but selected cross-section elements of a homogeneous electron beam to reach corresponding elements of the screen, e.g. selectron
H01J31/66 (Having means for allowing all but selected cross-section elements of a homogeneous) appears on 0 US grants and 0 published applications in this corpus.
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