Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6849213 | Method for producing silicon nitride filter | Nobuhiro Shinohara, Kanji Arai, Hideo Takahashi | 2005-02-01 |
| 6838026 | Method for producing a silicon nitride filter | — | 2005-01-04 |