DIFF Main Group
H01F 29/00 Variable transformers or inductances not covered by group H01F21/00
Introduced: September 1968
Title
Titles differ between systems:
IPC: Variable transformers or inductances not covered by group
CPC: Variable transformers or inductances not covered by group H01F21/00
Full Title
Full titles differ between systems:
IPC:
Variable transformers or inductances not covered by group
CPC:
Variable transformers or inductances not covered by group H01F21/00
IPC and CPC are identically structured here. All 4 subcodes exist in both systems.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
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- H01F 29/02 with tappings on coil or winding; with provision for rearrangement or interconnection of windings +1 CPC IPC+CPC Available in IPC and CPC
- H01F 29/06 with current collector gliding or rolling on or along winding IPC+CPC Available in IPC and CPC
- H01F 29/08 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators IPC+CPC Available in IPC and CPC
- H01F 29/14 with variable magnetic bias ( ; magnetic amplifiers H03F; ) +2 CPC IPC+CPC Available in IPC and CPC