Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863488 | Solid fuels | Sadahiko Maeda, Yasumasa Idei | 1989-09-05 |
| 4830707 | Method and apparatus for preparing high-concentration alkali | Robert Winkler, Siro Sala, Yakayuki Kobayashi | 1989-05-16 |