Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857120 | Heat-resisting steel turbine part | Osamu Watanabe, Kanzi Kawaguchi | 1989-08-15 |
| 4842706 | Sputtering target | Yoshiharu Fukasawa, Hideo Ishihara, Takashi Yamanobe | 1989-06-27 |
| 4820954 | Indirectly heated cathode structure for electron tubes | Sakae Kimura, Touru Yakabe | 1989-04-11 |