Top IPC subclasses
|
1
|
F16H
|
19
|
gearing
|
|
2
|
F03B
|
5
|
machines or engines for liquids
|
|
3
|
B23H
|
3
|
Working of metal by the action of a high concentration of electric current on a workpiece using an electrode which takes the place of a tool; such working combined with other forms of working of metal
|
|
4
|
F03D
|
2
|
Wind motors
|
|
5
|
B23F
|
2
|
making gears or toothed racks
|
|
6
|
G01F
|
2
|
measuring volume, volume flow, mass flow, or liquid levelmetering by volume
|
|
7
|
F22B
|
1
|
methods of steam generationsteam boilers
|
|
8
|
F04B
|
1
|
positive-displacement machines for liquidspumps
|
|
9
|
G01N
|
1
|
Investigating or analysing materials by determining their chemical or physical properties
|
|
10
|
G01L
|
1
|
measuring force, stress, torque, work, mechanical power, mechanical efficiency, or fluid pressure
|
|
11
|
B24B
|
1
|
machines, devices, or processes for grinding or polishingdressing or conditioning of abrading surfac
|
|
12
|
G01M
|
1
|
testing static or dynamic balance of machines or structurestesting structures or apparatus not other
|