Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6592798 | Method for preparing eutectic ceramics | Toshio Hirai, Masao Tokita | 2003-07-15 |
| 5439853 | Mixed oxide composite ceramics and method of producing the same | Toshio Hirai | 1995-08-08 |
| 5384293 | Rare earth oxide-alumina-silica sintered body and method of producing the same | Toshio Hirai | 1995-01-24 |
| 4569921 | Sintered silicon carbide molding and process for production thereof | Keigo Ohira | 1986-02-11 |
| 4564490 | Method of preparing sintered shapes of silicon carbide | Humihiko Takei | 1986-01-14 |
| 4502983 | Composite silicon carbide sintered shapes and its manufacture | Humihiko Takei | 1985-03-05 |