Utility
Subclass Subgroup Patent
A01D 41/127 09807931
A45C 11/005 09808058
B23D 57/0084 09808873
E02B 15/0871 09809942
F41A 33/06 09810502
G06F 17/5009 09811614
Design and Plant
Class Subclass Patent
D21 736 D0802066