Top IPC subclasses
1
|
H02M
|
5
|
apparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use wit
|
2
|
H01F
|
4
|
magnetsinductancestransformersselection of materials for their magnetic properties
|
3
|
H02J
|
2
|
circuit arrangements or systems for supplying or distributing electric powersystems for storing elec
|