Utility
Subclass Subgroup Patent
A42B 1/244 09808041
B66B 11/0226 09809423
C08J 3/05 09809684
F02M 31/14 09810182
  31/16 09810183
F16J 9/26 09810323
G01V 99/005 09810810
G06F 3/03547 09811182
G06Q 20/3829 09811828
H05B 3/68 09814102