Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8765718 | Cosmetic preparation comprising silicone | Makoto Matsuzawa, Keiichi Oyama | 2014-07-01 |
| 8501210 | Gel composition and pack cosmetic using the same | Keiko Tanaka, Keiichi Oyama | 2013-08-06 |
| 7632957 | Esterification reaction products and cosmetic products | Yoshihito Yamato, Yukiko Oi | 2009-12-15 |
| 6416771 | Moisturizing composition, base containing the same, and cosmetic or external preparation containing the moisturizing composition | Keiichi Oyama, Toshie Narita, Naoko Tsuchiya, Misako Tsuji | 2002-07-09 |
| 6117434 | Humectant composition, base containing the same, and cosmetic material or external preparation containing said humectant composition | Keiichi Oyama, Toshie Narita, Naoko Tsuchiya, Misako Tsuji | 2000-09-12 |