Top IPC subclasses
1
|
G08B
|
5
|
signalling or calling systemsorder telegraphsalarm systems
|
2
|
G01T
|
2
|
measurement of nuclear or x-radiation
|
3
|
G01J
|
2
|
measurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics o
|
4
|
G02B
|
1
|
optical elements, systems, or apparatus
|
5
|
G01B
|
1
|
measuring length, thickness, or similar linear dimensionsmeasuring anglesmeasuring areasmeasuring ir
|