CPC Subgroup
H01J 23/44 Rod-type coupling devices (H01J23/46, H01J23/48, H01J23/54 take precedence)
Full Title
Details of transit-time tubes of the types covered by group H01J25/00 > Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy > to or from the interaction circuit > Rod-type coupling devices (H01J23/46, H01J23/48, H01J23/54 take precedence)