A process and apparatus for spraying liquid at a target, which comprises atomizing liquid by charging it electrostatically, projecting the charge atomized liquid on a path toward the target and at least partially discharging the charged particles so formed with an ionic discharge induced by the particles...http://www.google.fr/patents/US4962885?utm_source=gb-gplus-shareBrevet US4962885 - Process and apparatus for spraying liquid
