Top IPC subclasses
1
|
H01L
|
6
|
Semiconductor devices; electric solid state devices not otherwise provided for
|
2
|
C01G
|
5
|
Compounds containing metals not covered by subclasses C01D or C01F
|
3
|
B82B
|
3
|
nano-structuresmanufacture or treatment thereof
|
4
|
G01N
|
2
|
Investigating or analysing materials by determining their chemical or physical properties
|
5
|
B82Y
|
2
|
|