Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870284 | Ion source and method of drawing out ion beam | Hideshi Kadooka | 1989-09-26 |
| 4838924 | Aromatic urea derivatives and their use as herbicide | Tetsuo Takematsu, Daisuke Fukuoka, Katsuya Takahashi | 1989-06-13 |
| 4808726 | Process for preparation of guanidine derivative | Ikuo Tomino, Houji Kato, Noriaki Kihara, Teruaki Mukaiyama | 1989-02-28 |