A method of spraying electrically charged particulate material to ground from a low flying airplane. The method includes the steps of imposing an electrical charge of given polarity upon an emitted primary spray of particulate material of sufficient magnitude to electrostatically enhance the deposition...http://www.google.es/patents/US4328940?utm_source=gb-gplus-sharePatente US4328940 - Method of electrostatically enhancing deposition of air borne spray materials
Method of electrostatically enhancing deposition of air borne spray materials
