|
| US4032924 | 30 Oct 1975 | 28 Jun 1977 | Nippon Telegraph and Telephone Public Corporation Sharp Kabushiki Kaisha | Distortion reduction in ink jet system printer |
| US4080606 | 5 May 1976 | 21 Mar 1978 | Hitachi, Ltd. | Ink jet printer |
| US4086601 | 24 May 1976 | 25 Apr 1978 | International Business Machines Corporation | Sequential ink jet printing system with variable number of guard drops |
| US4157551 | 10 May 1977 | 5 Jun 1979 | Nippon Telegraph and Telephone Public Corporation Sharp Kabushiki Kaisha | Distortion reduction in ink jet system printer |
| US4217595 | 25 Apr 1979 | 12 Aug 1980 | Ricoh Company, Ltd. | Charging phase control device for ink jet recording device |
| US4427986 | 1 Feb 1982 | 24 Jan 1984 | Fuji Xerox Co., Ltd. | Method of charging jetted ink drops |
| US4430656 | 18 Dec 1981 | 7 Feb 1984 | Hitachi, Ltd. | Method for reducing print distortion of ink drop writing apparatus |
| US4490729 | 15 Sep 1982 | 25 Dec 1984 | The Mead Corporation | Ink jet printer |
| US4491852 | 30 Jun 1983 | 1 Jan 1985 | Ricoh Company, Ltd. | Ink jet printing apparatus using guard drops |
| US4613871 | 12 Nov 1985 | 23 Sep 1986 | Eastman Kodak Company | Guard drops in an ink jet printer |
| US4849909 | 7 Nov 1985 | 18 Jul 1989 | Hitachi, Ltd. Hitachi Seiko, Ltd. | Ink-jet recording device |