WebCPC CPC COOPERATIVE PATENT CLASSIFICATION

H05F　STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY (electrostatic machines H02N; uses of electricity in performing operations, e.g. precipitation, see the relevant subclasses for the operations)

　　NOTE - This subclass covers methods or arrangements for preventing the formation of electrostatic charges on bodies or for carrying-off these charges after their formation.

　　This subclass does not cover specific applications of the above-mentioned methods or arrangements, e.g. during the manufacture of artificial fibres or films, which are covered by the relevant subclasses.

H05F 1/00 Preventing the formation of electrostatic charges

H05F 1/02 ・by surface treatment

H05F 3/00 Carrying-off electrostatic charges ({from shoes A43B 7/36}; from living beings A61N 1/14; {from tyres B60C 19/08; from vehicles B60R 16/06; from aircraft B64D 45/02; from large containers B65D 90/46})

H05F 3/02 ・by means of earthing connections

H05F 3/025 ・・{Floors or floor coverings specially adapted for discharging static charges}

H05F 3/04 ・by means of spark gaps or other discharge devices (devices providing for corona discharge per se H01T 19/00)

H05F 3/06 ・by means of ionising radiation

H05F 7/00 Use of naturally-occuring electricity, {e.g. lightning or static electricity}

--- Edited by Muguruma Professional Engineer Office(C), 2013 ---