Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5084080 | Device for trapping gaseous compounds of refractory metals and pumping plant including same | Ikuo Hirase, Denis Rufin, Tooru Sumiya | 1992-01-28 |
| 4981723 | Chemical vapor deposition of tungsten silicide using silicon sub-fluorides | Ikuo Hirase, Denis Rufin, Michael Schack, Tooru Sumiya, Sadayuki Urishima | 1991-01-01 |