Top IPC subclasses
1
|
B82B
|
6
|
nano-structuresmanufacture or treatment thereof
|
2
|
H01L
|
6
|
Semiconductor devices; electric solid state devices not otherwise provided for
|
3
|
C01B
|
3
|
non-metallic elementscompounds thereof
|
4
|
G02B
|
3
|
optical elements, systems, or apparatus
|
5
|
H01S
|
2
|
devices using stimulated emission
|
6
|
C01G
|
1
|
Compounds containing metals not covered by subclasses C01D or C01F
|
7
|
C25F
|
1
|
processes for the electrolytic removal of materials from objectsapparatus therefor
|
8
|
B81C
|
1
|
processes or apparatus specially adapted for the manufacture or treatment of micro-structural device
|
9
|
C01F
|
1
|
compounds of the metals beryllium, magnesium, aluminium, calcium, strontium, barium, radium, thorium
|