IPC 2013 : D04H 17/00 : Felting apparatus.

IPC2013 > D > D04 > D04H > D04H 17/00[m] > Felting apparatus.
Notes[t] D01 - D07: TEXTILES OR FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
D04H 17/10 · for felting between rollers, e.g. heated rollers.
D04H 17/12 · · Multi-roller apparatus.