Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5229093 | Method for making mullite whiskers using hydrofluoric acid | Hiroshi Arai, Zenjiro Nakai | 1993-07-20 |
| 5045514 | Sol-gel method for making composite mullite/cordierite ceramics | Zenjiro Nakai, Hideo Tsunatori | 1991-09-03 |