DIFF Subgroup
H01J 23/36 Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
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
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
IPC and CPC are identically structured here. All 3 subcodes exist in both systems.
IPC defines codes here since 1985.
Child Classifications
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- H01J 23/54 Filtering devices preventing unwanted frequencies or modes to be coupled to, or out of, the interaction circuit; Prevention of high frequency leakage in the environment since 1985 IPC+CPC Available in IPC and CPC