Issued Patents All Time
Showing 126–142 of 142 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5298923 | Ink jet misdischarge recovery by simultaneously driving an ink jet head and exhausting ink therefrom | Tatsuyuki Tokunaga | 1994-03-29 |
| 5231424 | Ink jet recording apparatus with efficient circulation recovery | Mineo Kaneko, Hidemi Kubota, Yutaka Koizumi, Torachika Osada, Toshiaki Hirosawa | 1993-07-27 |
| 5221931 | Driving method for ink jet recording head and ink jet recording apparatus performing the method | — | 1993-06-22 |
| 5220342 | Ink jet recording method | — | 1993-06-15 |
| 5204695 | Ink jet recording apparatus utilizing means for supplying a plurality of signals to an electromechanical conversion element | Tatsuyuki Tokunaga, Makoto Aoki, Ikumasa Ikeda | 1993-04-20 |
| 5173717 | Ink jet recording head in which the ejection elements are driven in blocks | Hideaki Kishida, Akira Katayama, Kimiyuki Hayasaki, Nobuyuki Watanabe, Toshiaki Hirosawa +4 more | 1992-12-22 |
| 5172141 | Ink jet recording head using a piezoelectric element having an asymmetrical electric field applied thereto | — | 1992-12-15 |
| 5164747 | Ink jet head with testing resistors | Torachika Osada, Toshiaki Hirosawa, Hidemi Kubota, Yutaka Koizumi, Mineo Kaneko | 1992-11-17 |
| 5130726 | Ink jet recording apparatus | Kyoko Fukushima, Kimio Nishitani | 1992-07-14 |
| 5124722 | Ink jet recording method | Masahiro Takei | 1992-06-23 |
| 5023630 | Ink jet recording head having a surface inclined toward the nozzle for acting on the ink | — | 1991-06-11 |
| 5019840 | Recording apparatus with improved sheet feeding | Yoshitaka Watanabe, Toshiharu Mamiya, Tadashi Ishikawa, Takashi Endo | 1991-05-28 |
| 4901092 | Ink jet recording head using a piezoelectric element having an asymmetrical electric field applied thereto | — | 1990-02-13 |
| 4894667 | Ink jet recording head having a surface inclined toward the nozzle for acting on the ink | — | 1990-01-16 |
| 4847638 | Recorder | — | 1989-07-11 |
| 4832518 | Apparatus for driving and controlling a printing head carriage | — | 1989-05-23 |
| 4682216 | Color image picture forming process and apparatus which improves the quality of the black portions of the picture | Takashi Sasaki, Nobuaki Sakurada, Hideaki Kawamura | 1987-07-21 |