Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6709631 | Weathering test apparatus | Takeshi Narita, Kazuo Okamoto, Masao Tsuji, Kazuyuki Tachi | 2004-03-23 |
| 6682932 | Weathering test method | Takeshi Narita, Kazuo Okamoto, Masao Tsuji, Kazuyuki Tachi | 2004-01-27 |