Issued Patents 1989
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889587 | Method of preparing a substrate for ink jet head and method of preparing an ink jet head | — | 1989-12-26 |
| 4881318 | Method of manufacturing a liquid jet recording head | Masami Ikeda | 1989-11-21 |
| 4873622 | Liquid jet recording head | Masami Ikeda | 1989-10-10 |
| 4870388 | Heat-generating resistor and heat-generating resistance element using same | Masao Sugata, Tatsuo Masaki, deceased, Shinichi Hirasawa, Yasuhiro Yano | 1989-09-26 |
| 4860033 | Base plate having an oxidation film and an insulating film for ink jet recording head and ink jet recording head using said base plate | Atsushi Shiozaki, Koichi Sato, Kazuaki Masuda | 1989-08-22 |
| 4851808 | Heat-generating resistor and heat-generating resistance device by use of said heat-generating resistor | Masao Sugata, Tatsuo Masaki, deceased, Shinichi Hirasawa, Yasuhiro Yano | 1989-07-25 |
| 4847639 | Liquid jet recording head and recording system incorporating the same | Masao Sugata, Tatsuo Masaki, deceased, Shinichi Hirasawa, Yasuhiro Yano | 1989-07-11 |
| 4845513 | Thermal recording head | Masao Sugata, Tatsuo Masaki, deceased, Shinichi Hirasawa, Yasuhiro Yano | 1989-07-04 |
| 4804974 | Thermal recording head | Masao Sugata, Tatsuo Masaki, deceased, Shinichi Hirasawa, Yasuhiro Yano | 1989-02-14 |