Top IPC subclasses
1
|
B63H
|
8
|
marine propulsion or steering
|
2
|
B43K
|
3
|
implements for writing or drawing
|
3
|
A63H
|
2
|
toys, e.g. tops, dolls, hoops, building blocks
|
4
|
B65D
|
2
|
Containers for storage or transport of articles or materials, e.g. bags, barrels, bottles, boxes, cans, cartons, crates, drums, jars, tanks, hoppers, forwarding containers; accessories, closures, or fittings therefor; packaging elements; packages
|
5
|
B63B
|
1
|
ships or other waterborne vesselsequipment for shipping
|