Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D586453 | Heat proof guard rail for industrial furnaces | Yasushi Okada, Shigetoshi Ajima | 2009-02-10 |
| D577114 | Heat proof guard rail for industrial furnaces | Yasushi Okada, Shigetoshi Ajima | 2008-09-16 |