|  | H |
SECTION H — ELECTRICITY

|  | H05 |
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR

|  | H05F |
STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY (electrostatic machines Fulltext... Hierarchy... Expanded...H02N; uses of electricity in performing operations, e.g. precipitation, see the relevant sub-classes for the operations)

|  | H05F |
Note(s) This sub-class deals with methods or arrangements for preventing the formation of electrostatic charges on bodies or for carrying-off these charges after their formation. Specific applications of these methods or arrangements, e.g. during the manufacture of artificial fibres or films, are dealt with in the relevant sub-classes.

|  | H05F 1/00 |
Preventing the formation of electrostatic charges

|  | H05F 1/02 |
· | by surface treatment

|  | H05F 3/00 |
Carrying-off electrostatic charges (from living beings Fulltext... Hierarchy... Expanded...A61N 1/14)

|  | H05F 3/02 |
· | by means of earthing connections

|  | H05F 3/04 |
· | by means of spark gaps or other discharge devices (devices providing for corona discharge per se Fulltext... Hierarchy... Expanded...H01T 19/00) [2]

|  | H05F 3/06 |
· | by means of ionising radiation

|  | H05F 7/00 |
Using naturally-occurring electricity