Top IPC subclasses
1
|
G06K
|
7
|
Recognition of data; presentation of data; record carriers; handling record carriers
|
2
|
B41M
|
4
|
printing, duplicating, marking, or copying processescolour printing
|
3
|
G07D
|
3
|
sorting, testing, changing, delivering, or otherwise handling coinstesting or changing paper currenc
|
4
|
B44F
|
1
|
special designs or pictures
|