Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6821088 | Centrifugal blower having noise-reduction structure | Kouji Matsunaga | 2004-11-23 |
| 6769876 | Centrifugal ventilator fan | Kouji Matsunaga, Yasushi Mitsuishi, Yoshiki Tada | 2004-08-03 |