Issued Patents 1989
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882109 | Process of preparing zirconia-coated silicon nitride sintered member | Minoru Matsui | 1989-11-21 |
| 4855263 | Silicon carbide sintered body and method of producing the same | Shinji Kawasaki | 1989-08-08 |
| 4843040 | Silicon nitride sintered bodies | Isao Oda | 1989-06-27 |
| 4818733 | Silicon nitride sintered bodies and a method of producing the same | Masahiro Shirai | 1989-04-04 |
| 4816349 | Zirconia-coated silicon nitride sintered member | Minoru Matsui | 1989-03-28 |
| 4804589 | Silicon carbide sintered members | Minoru Matsui | 1989-02-14 |
| 4801414 | Production of silicon nitride sintered body | Takao Soma | 1989-01-31 |
| 4795724 | Silicon nitride sintered bodies and process for manufacturing the same | Takao Soma | 1989-01-03 |