| 1/00 | Preventing the formation of electrostatic charges |
| 1/02 | Preventing the formation of electrostatic charges by surface treatment |
| 3/00 | Carrying-off electrostatic charges (from living beings A61N 1/14) |
| 3/02 | Carrying-off electrostatic charges (from living beings A61N 1/14) by means of earthing connections |
| 3/04 | Carrying-off electrostatic charges (from living beings A61N 1/14) by means of spark gaps or other discharge devices (devices providing for corona discharge H01T 19/00) |
| 3/06 | Carrying-off electrostatic charges (from living beings A61N 1/14) by means of ionising radiation |
| 7/00 | Use of naturally-occurring electricity |