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PCE
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DIFF Subgroup
H01J 23/52

the coupled helices being disposed coaxially around one another

Introduced: January 1985

Full Title

Full titles differ between systems:

IPC:

Details of transit-time tubes of the types covered by group > Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy > to or from the interaction circuit > for linking interaction circuit with coaxial lines; Devices of the coupled helices type > the coupled helices being disposed coaxially around one another

CPC:

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 > for linking interaction circuit with coaxial lines; Devices of the coupled helices type (H01J23/46 takes precedence) > the coupled helices being disposed coaxially around one another

No child classifications to compare. This is a leaf node in both IPC and CPC.