Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6638345 | Method for collecting reversely subliming substance and apparatus therefor | Tsukasa Takahashi, Kenji Nakahara | 2003-10-28 |
| 6576773 | Method for production of pyromellitic dianhydride | Kenji Nakahara, Tsukasa Takahashi | 2003-06-10 |