Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887059 | Iron core of electromagnet and method of producing the same | Hiroshi Hashimoto | 1989-12-12 |
| 4880650 | Method for stabilization treatment of beer with hydrated silica gel | Katsutoshi Okamura, Yasuo Esaki, Koichi Matsuzawa | 1989-11-14 |