Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4643858 | Process for preparation of sintered silicon nitride body | — | 1987-02-17 |
| 4628039 | Sintered silicon nitride body | Kiyoshi Yokoyama | 1986-12-09 |
| 4622186 | Process for preparation sintered silicon nitride body having surface compression stress | — | 1986-11-11 |