Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6805742 | Silicon semiconductor substrate and process for producing the same | Akiyoshi Tachikawa, Atsushi Ikari | 2004-10-19 |
| 6767848 | Silicon semiconductor substrate and method for production thereof | Akiyoshi Tachikawa | 2004-07-27 |