Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4832771 | Method for bonding ceramics | Takashi Hamamatu, Nobuhiro Sato | 1989-05-23 |
| 4832888 | Method for producing high-density silicon nitride sintered product | Nobuhiro Sato, Yuji Katsura, Takashi Hamamatu | 1989-05-23 |