IPC 2013 : E05B 13/06 : shaped as bolt detents arranged in the path of motion of the key bit.

IPC2013 > E > E05 > E05B > E05B 13/00 > E05B 13/06[1] > shaped as bolt detents arranged in the path of motion of the key bit.
Notes[t] E01 - E06: BUILDING
Notes[g] E05B 1/00 - E05B 19/00: Details or accessories of locks or the like; keys
E SECTION E — FIXED CONSTRUCTIONS.
E05 LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES.
E05B LOCKS; ACCESSORIES THEREFOR; HANDCUFFS.
E05B 13/00 Devices preventing the key or the handle or both from being used.
E05B 13/06 · shaped as bolt detents arranged in the path of motion of the key bit.