Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6014846 | Multi-window sash and batten attachment structure | Yasuhiro Sono, Masao Hirano | 2000-01-18 |
| 5937597 | Multi-window sash and batten attachment structure | Yasuhiro Sono, Masao Hirano | 1999-08-17 |