Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6660888 | Process for producing retinol and intermediate compounds for producing the same | Toshiya Takahashi, Kazutaka Kimura, Noriyuki Doi, Naoto Konya | 2003-12-09 |
| 6552219 | Process for the preparation of vitamin a, intermediates, and process for the preparation of the intermediates | Toshiya Takahashi, Atsushi Furutani | 2003-04-22 |