|
| US3973933 | 30 May 1975 | 10 Ago 1976 | | Particle charging device and an electric dust collecting apparatus |
| US3976448 | 24 Mar 1975 | 24 Ago 1976 | Lin Eng Corporation | Electrostatic and sonic gas processing apparatus |
| US3980455 | 12 Ago 1974 | 14 Sep 1976 | | Particle charging device and an electric dust collecting apparatus making use of said device |
| US4018577 | 15 Abr 1974 | 19 Abr 1977 | Ishikawajima-Harima Jukogyo Kabushiki Kaisha | Particle charging device for use in an electric dust collecting apparatus |
| US4133649 | 2 Ago 1977 | 9 Ene 1979 | High Voltage Engineering Corporation | Reduced power input for improved electrostatic precipitation systems |
| US4183736 | 2 Ago 1976 | 15 Ene 1980 | High Voltage Engineering Corporation | Electrostatic precipitation |
| US4236900 | 30 Mar 1978 | 2 Dic 1980 | Maxwell Laboratories, Inc. | Electrostatic precipitator apparatus having an improved ion generating means |
| US4349359 | 14 Abr 1980 | 14 Sep 1982 | Maxwell Laboratories, Inc. | Electrostatic precipitator apparatus having an improved ion generating means |
| US4364752 | 13 Mar 1981 | 21 Dic 1982 | | Electrostatic precipitator apparatus having an improved ion generating means |
| US4488885 | 1 Nov 1982 | 18 Dic 1984 | High Voltage Engineering Corporation | Electrostatic charging apparatus |
| US7465338 | 19 Jul 2006 | 16 Dic 2008 | | Electrostatic air-purifying window screen |
