Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6884853 | Cosmetic resin composition | Takahiro SAKURAI, Katsuya Koyama, Toshitaka Tsuzuki, Tomohiro Hashimoto | 2005-04-26 |
| 6737069 | Cosmetic compositions containing amphoteric polyurethanes | Katsuya Koyama, Toshitaka Tsuzuki, Tomohiro Hashimoto | 2004-05-18 |
| 6692729 | Cosmetic resin composition and cosmetic using the same | Takahiro SAKURAI, Katsuya Koyama, Toshitaka Tsuzuki, Tomohiro Hashimoto | 2004-02-17 |
| 6646092 | Method for manufacturing amphoteric urethane resin and amphoteric urethane resin and resin composition obtained therewith | Tomohiro Hashimoto, Takeshi Baba, Tetsuo Sakurai | 2003-11-11 |