Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5427503 | Multi-stacked circular plate fan provided with blades | Hisato Haraga, Yasuo Hamada | 1995-06-27 |
| 5292479 | Air treatment by multi-stacked plate asembly | Hisato Haraga, Hajime Miyazaki, Yasuo Hamada, Ayako Hirano | 1994-03-08 |