Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888311 | Ceramic-ceramic composite material and production method | Nicolas Davidovits, Michel Davidovics | 1989-12-19 |
| 4859367 | Waste solidification and disposal method | — | 1989-08-22 |