DIFF Subgroup
H01F 21/08 by varying the permeability of the core, e.g. by varying magnetic bias
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Variable inductances or transformers of the signal type > continuously variable, e.g. variometers > by varying the permeability of the core, e.g. by varying magnetic bias
CPC:
Variable inductances or transformers of the signal type (H01F36/00 takes precedence) > continuously variable, e.g. variometers > by varying the permeability of the core, e.g. by varying magnetic bias
No child classifications to compare. This is a leaf node in both IPC and CPC.