Utility
Subclass Subgroup Patent
A47D 1/10 09808097
A47K 13/307 09808132
A61B 17/1657 09808264
A63B 71/1216 09808702
B01D 53/22 09808757
B65H 63/08 09809416
H01H 9/30 09812269
H04N 1/32272 09813580