Top IPC subclasses
|
1
|
H02S
|
20
|
|
|
2
|
H01L
|
19
|
Semiconductor devices; electric solid state devices not otherwise provided for
|
|
3
|
F24S
|
15
|
|
|
4
|
G09F
|
7
|
displayingadvertisingsignslabels or name-platesseals
|
|
5
|
F24J
|
6
|
Production or use of heat not otherwise provided for
|
|
6
|
E04D
|
5
|
roof coveringssky-lightsguttersroof-working tools
|
|
7
|
G02B
|
4
|
optical elements, systems, or apparatus
|
|
8
|
A01K
|
4
|
animal husbandrycare of birds, fishes, insectsfishingrearing or breeding animals, not otherwise prov
|
|
9
|
H04N
|
3
|
pictorial communication, e.g. television
|
|
10
|
F25D
|
3
|
refrigeratorscold roomsice-boxescooling or freezing apparatus not covered by any other subclass
|
|
11
|
A63B
|
3
|
apparatus for physical training, gymnastics, swimming, climbing, or fencingball gamestraining equipm
|
|
12
|
F25B
|
3
|
refrigeration machines, plants, or systemscombined heating and refrigeration systemsheat pump system
|
|
13
|
E04B
|
3
|
General building constructions; walls, e.g. partitions; roofs; floors; ceilings; insulation or other protection of buildings
|
|
14
|
E04F
|
2
|
finishing work on buildings, e.g. stairs, floors
|
|
15
|
G03B
|
2
|
apparatus or arrangements for taking photographs or for projecting or viewing themapparatus or arran
|
|
16
|
F21V
|
2
|
functional features or details of lighting devices or systems thereofstructural combinations of ligh
|
|
17
|
G09B
|
2
|
educational or demonstration appliancesappliances for teaching, or communicating with, the blind, de
|
|
18
|
F24D
|
2
|
domestic- or space-heating systems, e.g. central heating systemsdomestic hot-water supply systemsele
|
|
19
|
G06F
|
1
|
electric digital data processing
|
|
20
|
A61B
|
1
|
Diagnosis; surgery; identification
|