| 422 / | HD | CHEMICAL APPARATUS AND PROCESS DISINFECTING, DEODORIZING, PRESERVING, OR STERILIZING |
| 919 | DD | BURETTES; PIPETTES [B01L 3/02] {5} |
| 922 | DD | .~ Pipettes, i.e., with only one conduit for withdrawing and redistributing liquids [B01L 3/02C] {1} |
| 923 | DD | .~.~ Plunger pump type [B01L 3/02C3] {6} |
| 928 | | .~.~.~ Repeating pipettes, i.e. for dispensing multiple doses from a single charge [B01L 3/02C3R] |