Top IPC subclasses
|
1
|
F03D
|
11
|
Wind motors
|
|
2
|
H02S
|
3
|
|
|
3
|
B63H
|
2
|
marine propulsion or steering
|
|
4
|
F03B
|
2
|
machines or engines for liquids
|
|
5
|
H01L
|
2
|
Semiconductor devices; electric solid state devices not otherwise provided for
|
|
6
|
G08B
|
1
|
signalling or calling systemsorder telegraphsalarm systems
|
|
7
|
G01L
|
1
|
measuring force, stress, torque, work, mechanical power, mechanical efficiency, or fluid pressure
|
|
8
|
B29C
|
1
|
shaping or joining of plasticsshaping of substances in a plastic state, in generalafter- treatment o
|
|
9
|
G01B
|
1
|
measuring length, thickness, or similar linear dimensionsmeasuring anglesmeasuring areasmeasuring ir
|
|
10
|
G01M
|
1
|
testing static or dynamic balance of machines or structurestesting structures or apparatus not other
|