IPC Main Group
H01F 29/00 Variable transformers or inductances not covered by group
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
4 direct subcodes
Child Classifications
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- H01F 29/02 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F 29/06 with current collector gliding or rolling on or along winding
- H01F 29/08 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators
- H01F 29/14 with variable magnetic bias