Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880756 | Silicon nitride sintered product | Kazuhiro Urashima, Yo Tajima, Kenji Nakanishi | 1989-11-14 |
| 4877760 | Aluminum nitride sintered body with high thermal conductivity and process for producing same | Akiyasu Okuno, Kazuhiko Ikoma | 1989-10-31 |
| 4833871 | Apparatus for inserting optical fibers into a spacer having spiral grooves | Satoshi Ogawa, Masanori Fujikawa | 1989-05-30 |
| 4800137 | Composite layer aluminum nitride base sintered body | Akiyasu Okuno, Kazuhiko Ikoma | 1989-01-24 |