Top IPC subclasses
1
|
F21S
|
2
|
non-portable lighting devices or systems thereof
|
2
|
H01L
|
2
|
Semiconductor devices; electric solid state devices not otherwise provided for
|
3
|
F03D
|
1
|
Wind motors
|
4
|
H05B
|
1
|
electric heatingelectric lighting not otherwise provided for
|
5
|
H02P
|
1
|
control or regulation of electric motors, generators, or dynamo-electric converterscontrolling trans
|